------------------------------------------------------------------------ Methods of dating the earth are inaccurate. Exactly what is meant by "inaccurate" leaves much to be desired. Please see the August 1989 Scientific American article on the Age of the Earth. (page 90, by Lawrence Badash, "The Age-of-the-Earth Debate") ------------------------------------------------------------------------ Radioactive dating can't be calibrated. You are in this case Dead Wrong. Dating of ancient rocks by radiometric methods (e.g., Uranium-Lead, Potassium-Argon, Rubidium- Strontium) does NOT, repeat NOT depend upon our having available a sample of known age to calibrate the method. Indeed, this is PRECISELY WHY these methods are so useful. The only calibration required is the measurement of decay rates, which can be done IN THE LABORATORY. Furthermore, these methods can be used in ways that do NOT, repeat NOT depend on any assumptions about the initial amounts of the various isotopes involved. Please read the section in Chapter 17 of Strahler's book, Science and Earth History. It is true that Carbon-14 dates must be calibrated for variations in the amount of 14C produced in the atmosphere; however, the corrections are small (~10%) and affect only recent ages (~50,000 years). This method is not used to date rocks. The guy who thought that radioactive dating required knowing the initial amount of lead. He apparently had never heard of isotopes, either. He made a big thing about a science he was a master of: he wrote its name on the blackboard: "numerical analysis". He indicated how this allowed him to "proved" that radiodating was wildly inaccurate. No mention of the fact that the earth was still real old. He encouraged people to go buy a book on numerical analysis: he gave its name. He didn't bother to encourage people to buy a book on dating, perhaps because he hadn't read one himself ? ------------------------------------------------------------------------ Radioactive decay rates did not remain constant, so you can't accurately date things If radioactive decay rates were to change, the structure of stars would be affected. But even very distant stars (whose light has been travelling towards us for very long times) have the structure that is predicted by theory assuming present decay rates. They do not have the structure that would be predicted for them if the decay rates were many orders of magnitude larger. There are two major kinds of radioactive decay, alpha decay and beta decay. They are due to different physical processes and are governed by different natural constants. If the decay rates were to change in time, this would produce discrepant dates in rocks that can be dated independently by several different decay series. These discrepancies are not observed. If the decay rates were large enough to produce 4.5 billion years' of apparent aging in only 6000 years of wall-clock time, the decay rates would have had to have been millions to billions of times as large when Adam and Eve were around as now. The heat generated would have melted the earth, which would still be molten. Furthermore, the earth would have been too radioactive to support life then. Adam and Eve would have glowed for other reasons than their nearness to God. ------------------------------------------------------------------------ These laws affirm the fact that the creation of matter or energy is not know taking place, and, in fact, that the available energy of the universe as a whole is continually running down rather than building up. Point of fact, matter IS being created currently. Also destroyed. See "virtual particles". And the "available energy of the universe as a whole" says nothing about localities within it... ------------------------------------------------------------------------ Helmholtz's contraction theory says the sun is < 20,000,000 years. This (suns energy comes from contraction) is decades old and discarded soon after the discovery of radioactivity. See the Scientific American article from August 1989. The German physicist Hermann von Helmholtz formulated this concept around 1869. It has been soundly rebuffed in the last 100 years. The guy who thought that we were detecting 0 (zero) solar neutrinos, thus proving his theory that the sun was shining due to the gravitational energy released as it shrank. (they are there, and have been detected) ------------------------------------------------------------------------ Sun is shrinking by ~5 feet per hour. i.e losing 0.01% per year. 6,000 creation = ~6% shrinkage, but 20,000,000 years ago the sun touched the earth and 100,000 years ago the sun was twice as large (making life impossible) I am interested in how you decide that this is a steady-state system? A "Sun" that large could not possibly have this solar system. A brief discussion of this is found in ``Looking Inside the Sun'', ASTRONOMY, March 1989. Analysis of historical records of eclipses and transits give varying numbers. One result gives 2.25 arcseconds per century, similar to the above figure. Another result gives an upper limit of 0.3 arcsecond per century, but is also consistent with no shrinkage. Two more historical analyses indicate that the sun was a bit larger a century ago than today. Current measurements indicate that the sun is not now shrinking. The long term stability of the size of the sun remains unknown. ------------------------------------------------------------------------ Lunar dust--only 1 to 3 inches, not 54 feet. The calculation you refer to is given by Henry Morris on pp. 151-153 of Scientific Creationism. It is based on a grossly erroneous figure of 14 million tons of meteoritic dust per year, quoted by Petterson in 1960. Morris misinterpreted Petterson's article. Petterson published a figure of 15 (not 14) million tons per year as an upper limit. In other words, Petterson said that the value is not more than. 15 million tons per year. He was not able to measure an actual value. Morris erroneously chose to interpret it to mean it was equal to 14 million tons per year. Accurate values were measured in the late 1960's. The actual value is much lower than 15 million tons per year. Dalrymple gives the value of 22,000 tons per year, nearly 700 times smaller than your figure. That changes your 54 foot figure into about 2 cm, which is quite consistent with the amount of surface soil the astronauts found on the Moon (it was considerably more than 1-2 mm). My copy of "Everyman's Astronomy" indicates that the earth collects about 9000 kg per day from meteors of visual magnitude 5.0 or brighter. Assuming a typical rock density of 3 g/cc, this corresponds to an accumulation rate of one inch per 10 billion years. Unfortunately no data is presented for fainter meteors. I wouldn't be surprised to find that the actual rate is one or two orders of magnitude higher, but "1 inch in 8000 years" is off by six orders of magnitude. A dust accumulation rate of "one inch per 8000 years" should should create a spectacular year round meteor shower, and cause severe pitting of the space shuttle windshields in just a single orbit. My quick estimates give values far higher than have been actually observed. ------------------------------------------------------------------------ Deterioration of earth's magnetic field, at present rates, implies an excessive field 10,000 years ago. (Decay of Earth's Magnetic Field - Result of research by Thomas Barnes during his tenure as Physics Professor at UTEP. Published in Origin and Destiny of Earth's Magnetic Field, 1973. Barnes notes the measured values over the last 150 years and models according to uniformitarian principles. The decay is not a steady state. In fact, there is considerable evidence for reversals. The atlantic ocean floor as it spreads shown the weakening - reversing - strengthening recorded in its stone as the continents spread from the mid-atlantic ridge. The field is expected to reverse sometime in the next few thousand years. A time scale on page 78 shows the reversals over the past 170 million years, as deduced from the magnetic patterns in oceanic crust. I counted about 200 reversals on the chart. Briefly, Barnes took approximately 150 years of data on the Earth's dipole magnetic field and extrapolated it backwards to about 10000 years Before Present (B.P.). He stated that the field 10,000 years ago would, on this calculation, have been as strong as that of a magnetic star, and stated (correctly) that this was absurd. However, there are four fatal flaws in his analysis. In the first place, Barnes studied only the dipole component of the Earth's magnetic field, In fact, the very same data that Barnes used show that the nondipole component of the field increased during the same period of time, almost exactly cancelling the decrease in the dipole field that Barnes calculated (D. Brent Dalrymple, U. S. Geological Survey, Menlo Park CA, in Reviews of 31 Creationist Books). This alone is sufficient to destroy the basis of his work. The second failure of Barnes' study was the idea that one can take data from a short period of time and simply extrapolate it backwards to obtain a reliable estimate at a time remotely removed from the data. Anyone competent in analyzing scientific data knows that extrapolations are good only for a relatively short period of time, if at all, and that the further away from the actual data one goes, the less reliable it becomes. Barnes extrapolated 150 years' worth of data back 10,000 years! In real life, one would be surprised if extrapolation of these data more than a few hundred years back were accurate. The third failure of Barnes' study was the mathematical model he chose. He decided to fit the data to an exponential. The data fit a straight line just as well (see Figure 1 of Stephen G. Brush's article in Scientists Confront Creationism), but a straight line would have given a much older age for the Earth than the 10,000 years that Barnes, because of his Biblical literalism, wishes to promote. The fourth failure of Barnes' study was his failure to consider any other evidence than the 150 years worth of data from geomagnetic observatories that he used. There exists, in paleomagnetic data, a long record of the Earth's magnetic dipole strength (extending backwards for millions of years). The data are in agreement with the observatory data Barnes used over their common intersection, but they differ drastically from Barnes' extrapolation when one goes further back in time. ------------------------------------------------------------------------ Atmospheric helium should have built up more from U decay. This statement is false. It falls precisely within predicted limits. Please read: Calculations on the Composition of the terrestrial Planets Reynolds & Summers, Journal of Geophysical Research vol 74, no 10 May 15, 1969 p 2494 The formation of the Earth from Planetesimals Wetherill, Scientific American June 1981 Atmospheric and Hydrospheric Evolution on the Primitive Earth Cloud, Preston E., Jr., Science 160, (17 May 1968), pp 729 - 736 The Effect of a Planet's Size on the Evolution of its Atmosphere Mart, Michael H, published in some conference or another; I got a copy from the author. (ave Allen davea@ll-vlsi.ARPA) Our Evolving Atmosphere Is Anyone There? by Isacc Asimov The Evolution of the Atmosphere of the Earth Hart, Icarus, 33, 23-39, 1978 Evolution of the Atmosphere and Oceans Holland, Lazar & McCaffery, Nature vol 320, 6 mar 1986 Heat and Helium in the Earth O'Nions & Oxburgh, Nature, vol 306, 1 Dec 1983 The Atmosphere Ingersoll, Scientific American, Sept 1983 ------------------------------------------------------------------------ Receding moon would have been touching earth 2 billion years ago. Check up on your orbital dynamics... Assumes a steady rate of recession. Assumes the moon wasn't captured less than 2 billion years ago. ------------------------------------------------------------------------ All comets would have disintegrated after 10,000 years. Jupiter and Saturn wreak havoc to the comet orbits. Some long-period comets are perturbed into short period orbits, others are permanently ejected. Comets are believed to have a short lifetime after being perturbed to short periods. Actually, the Oort cometary cloud hypothesis (published by Jan H. Oort in 1950) was originally proposed in order to explain "the rate of appearance of long-period comets" (i.e. there are a lot of them). It really didn't have anything to do with the age of short-period comets (which the note above refers to). [Long-period > 200 yrs, short-period &l< 200 yrs.] The problem that is referred to by the creationist here is that the short- period comets have not occupied their present orbits for very long (in astronomical terms). Each time a comet passes close to the sun, some of its matter is driven off into space by the sun's energy (forming its "tail"). "Short-period" comets are believed by astronomers to have a lifetime of only a few thousand years, because after that all of their "tail-producing" matter would be used up (indeed, astronomers have noted comets to "vanish"; the remaining material only makes its presence known upon entering the Earth's atmosphere; this is likely the origin of meteoroid swarms.) However, the fact that a comet cannot have occupied its present orbit for very long does not automatically imply that it is young. The Oort hypothesis does explain this problem as well, in that long-period comets -- if frequent enough -- will be moved into short-period orbits by a relatively near approach to a planet (comet loses momentum, planet gains it, comet is now in a vastly shorter orbit, planet is now in a very slightly longer orbit). In fact, of the short-period comets, roughly half orbit pretty much between the sun and jupiter, leading astronomers to believe that jupiter "captured" them into their current orbits. (Statistically, we would expect the largest planet -- the best "capturer" -- to have captured the most short-period comets). Finally, nobody really knows about the Oort cloud. Astronomers like the way it explains the frequency of long-period comets, and there is much support for it amongst them. It apparently also explains the youth of the short-period comets, quite nicely. However, until we see a comet get sucked into a short-period orbit (apparently this must happen every 100 years or so), or until we send something out to 10,000 A.U., Oort's proposal remains a hypothesis. (Conclusion: it was not cooked up to explain young short- period comets; this is something of a "fringe benefit". But we aren't very sure that it's true, either.) [From Strahler, "Science and Earth History", New York:Prometheus, 1987; p. 143] ------------------------------------------------------------------------ An important element in the argument against the evolutionary universe is the failure of conventional cosmology to solve the problem of galaxy formation. ``With the development of GUT, we see galaxy formation is no longer a problem at all but simply one more natural phenomenon with a perfectly natural explanation.'' [James S. Trefil, The Moment of Creation] ------------------------------------------------------------------------ Biblical cosmology And in several places in the Bible, the sky is referred to as a vault, with the stars stuck on it. Genesis 1 refers to water above this vault (an idea no doubt borrowed from the Babylonian cosmology, which pictured the Earth as a flat disk inside a cosmic bubble in a cosmic sea). The Book of Revelation states that the stars will someday fall out of the sky like figs from a tree. The Bible says little about the shape of the Earth, referring in one place to the "circle" of the Earth (a disk shape), and in another place to the "four corners" of the Earth (a rectangular surface shape). In one of the Gospels, the Devil tempted Jesus by taking him up a mountain where he could see "all the kingdoms of the world" (no further info on this remarkable mountain). This would only be possible if the Earth was flat. The Bible does indicate more clearly, however, that the Earth is motionless. Witness Joshua's telling the Sun (and not the Earth) to stop just so he could win one of his battles, and some of the Psalms that state that the Earth is motionless. The Joshua story can be used to find a Biblical estimate of the distances of the Sun and the Moon from the Earth. Since we are told that the Sun was stopped to illuminate the Valley of Gibeon, and the Moon to illuminate the Valley of Aijalon, we conclude that either one of them would have been insufficient for both -- and that requires that the Sun be low when viewed from the Moon's valley, as it were, and vice versa. This implies that the distances to the Sun and the Moon are comparable to the distance between the Valleys of Gibeon and Aijalon, which is about 10 mi. In all fairness to the writers of the Bible, none of this cosmology is any worse than the cosmological pictures developed by surrounding peoples, with one exception. Ancient Greek proto-scientists (if that is the proper word) were, without any modern technology, able to establish that the Earth was approximately spherical, and were able to work out the approximate size of the Earth and the distance to the Moon. The distance to the Sun was more difficult, and almost all were agreed that the Sun moved around the Earth. But this knowledge was gained only after the Old Testament was written, though some of the writers of the New Testament may have learned of Aristotle's demonstration of the approximate sphericity of the Earth three centuries ago. The Greeks had data which anyone else living before modern times could collect, but they put the pieces together in the right fashion, and, for some reason, there is no hint of that in the Bible. ------------------------------------------------------------------------ Rift between mathematicians & biologists Here's an interesting story... (I think)... In 1967, a few mathematicians and biologists were chatting over a picnic lunch organized by Victor Weisskopf, prof. of physics at MIT. A "weird" discussion took place as the conversation turned to the subject of evolution by natural selection. The mathematicians were stunned by the optimism of the evolutionists about what could be achieved by chance. The wide rift between the participants led them to organize a conference on "Mathematical Challenges to the Neo-Darwinian Theory of Evolution"...(skip to the conference)... which opened with a paper by Murray Eden, Prof. of Electrical Engineering at MIT, entitled "The Inadequacy of Neo-Darwinian Evolution as a Scientific Theory". Eden showed that if it required a mere six mutations to bring about an adaptive change, this would occur by chance only once in a billion years --while, if two dozen genes were involved, it would require 10,000,000,000 years, which is much longer than the age of the earth. (See Gordon R. Taylor's "The Great Evolution Mystery"). "Since evolution does occur and has occurred, something more than chance mutation must be involved. Von Neumann & complexity It's hard to see how the described "wide rift" between biologists and mathematicians could exist, since most of the population geneticists I know are mathematicians--like my thesis advisor, a PhD in Statistics. Population genetics is an intrinsically mathematical subject, as my students found with great dismay about 2 weeks into the course I TA'ed on the subject..... I get a little angry when people seem to be implying that evolution is casually refutable and was refuted (by a professor of electrical engineering?) decades ago. Do they really think that two decades of bright, dedicated biologists would stick to a theory that this kind of argument could refute? Adaptive change by mutation has been shown in the laboratory and is not in question. It is quite easy to demonstrate in bacteria, and advantageous forms which were generated by the co-occurrence of multiple mutations are quite possible. Three points are usually being missed by people who make Prof. Eden's mistake: 1. Disadvantageous forms can persist in the population for a long time; 2. Multiple ways to the same end (multiple mutations giving the same result) are not only possible but common; 3. Intermediate steps often have an inobvious advantage in themselves, making them targets of natural selection. Seriously, there is something badly wrong with the mathematician's models if this story is true. In the first place, there isn't really a necessity for each mutation to occur from a blank slate - virtually all species have a fair amount of diversity. In the second place, there is a considerable amount of recombination - even with base pairs on the same chromosome (crossover) (or maybe the mathematician has never heard of sex :-). Thirdly, the rate of mutations can be measured and is significantly higher than what appears to be implied by the fixing of 6 mutations in 1 billion years. Fourthly, if any intermediate forms have any slight advantage (due to partial implementation of the feature), then those forms will be selected -- and selection is NOT a random process. Fifthly, many single point mutations have similar/identical effect (that is, it wouldn't be necessary for 6 specific mutations to occur but one from each of 6 different sets, a much easier problem). All I can figure is that the model assumes a population of a single homozygous individual whose progeny never exchange any genetic material and in which the mutated genes never recombine by crossover during mitosis. In other words, sort of like analyzing the aerodynamics of racehorses by assuming a spherical horse Sounds like he's talking about six simultaneous mutations, which may very well be statistically phenomenal. Not required they be simultaneous by evolution however, and once one mutation is replicating throughout a group of related organisms, the odds then go up that one of them might develop another significant mutation in addition to the one they are now carrying. ------------------------------------------------------------------------ Exponential population growth And by the same exponential growth law we are up to our armpits in roaches. This does obviously not happen, therefore there are other constraints. What leads Creationists to conclude that the exponential growth constants for a 50 year sample apply to 5000 years? This is known as "extrapolating beyond region of known fit". The growth curve is exponential. The population origin can be extended back much further in time, and the recent doublings are bunched together. I love exponential growth when used by those unaware of the basics for the derivation. You can use the same system to show that we are up to our armpits in fruit flies every 3 years or so... According to U.N. figures, the world population in 1650 was 508 million, up from 200-300 million in 1 AD. This corresponds to a growth rate of 0.032 to 0.057% per year during much of recorded history, far lower than the "sickly 0.5%" used here. 5000 years of growth at 0.057% would increase the population by a factor of 17, much less than the 7*10^10 implied by a rate of 0.5%. ------------------------------------------------------------------------ Various conceivable patterns fail to emerge, despite an overwhelming tendency to diversify. There is always luck. If the mutation does not occur, you cannot select for it. Evolution is not aimed. That's a deity's job. Evolution handles the current entity, not some future not-yet-conceived entity for some not-yet environment. ------------------------------------------------------------------------ Complexity from simplicity ``There was no primordial chaos before the big bang - not really. Instead, everything was neatly concentrated in one location. Then it scattered, and is still scattering, a disorderliness far exceeding the structural order of galaxies, stars, planets, and life forms which have appeared in the course of the process.'' [Poul Anderson "Science & Creation" Analog, Sept 1983] Ref the information example. It is easy to get VERY complicated systems containing a tremendous amount of information starting from very simple, low information systems. Two methods: 1. fractal structures - start with a very simple rule and repeat it over and over and over. The resulting structure can be (usually is) VERY complicated, but the formation equations can be very, very simple. And the universe has had a long time to do so. Example: Look at a snowflake. 2. chaos - You can get very, very complicated systems if you use nonlinearities in the progression. That is why weather forecasting doesn't work. Complexity does not imply design. Recursion or nonlinearity work quite well. And the world is recursive and very non-linear. I went and got "Theory of Self-Reproducing Automata" by Von Neumann. You know that it was done in 1966 before most of the chaos & fractal work? As an initial look, I see how this is NOT applicable to life as Micha tried to do in < 10541@dasys1.UUCP >. Looking at section 5.3.2 "Self-Reproducing automata" we find that, under his constraints, the secondary (initially quiescent) automaton is identical to the parent, except that the constructing automaton is larger, and in a sense more complex, because the construction automaton contains the complete plan and a unit which interprets and executes this plan. This should NOT apply to biological forms as discussed here because: The plan IS the unit that executes itself. In Mary's term, the life is the language. and, what I consider more relevant The constructed automaton IS NOT A DUPLICATE of the constructing automaton. No parent unit that I am aware of (excluding fission reproduction, in which the parent unit cannot be identified afterwards) is the child a duplication of the parent. In every case that I am aware of the constructed unit is a simpler and much smaller unit, which grows OF ITSELF into a near-copy of the original. Since the complexity is added AFTER the reproduction process, the reproduction process should not be a limiting factor. Proof: watch almost ANYTHING grow up. Therefore, while the descent is INITIALLY simpler than the parent, its final state can be more complex. Therefore, the argument that information theory proves that life could not have come from non-life is invalid. BTW: New systems of cooperating parts have evolved, and they are not even biological. See "The Evolution of Cooperation", in particular the computer simulations in which the routines "decide" ON THEIR OWN that cooperation is "better". ------------------------------------------------------------------------ Simulations cannot produce effects And I am as sure of the statement "Selection can change the frequencies of variants", since I've done computer simulation to test it. That's most of evolutionary theory right there. Mary, that is very interesting. Could you describe how you modeled selection pressure. Any thing that I have seen (i.e., non technical info) is so vague about what selection is that I have no idea how to model it. Examples like the light vs dark moths seems too simplistic to me. It shows how the number of species (or the amount of variation) can decrease but it gives me no hint as to how the number of species can increase. Directional selection (selection "for" or "against" something) in a static environment will lose variation. To get a more interesting result, you can look at either of two things: 1. Selection which is not directional. Here are some examples: Frequency dependent selection. Forms which are rare are at an advantage. There are several decent real-world examples of this; female fruit flies prefer males who look "different", and animals which have immune system genes different from their neighbors' seem less likely to get diseases from them. Heterozygote advantage. The organism with two different forms of the gene has an advantage over others. The classical example is sickle-cell anemia in humans, where the person with one sickle and one normal allele is protected from malaria. Two kinds of selection pulling in different directions. For example, females may prefer brightly colored males, but so may predators. Some values for the parameters here will give a balance of different forms in the population. 2. Non-static environments. This is much harder to model, but interesting. You can easily get frequency-dependent selection out of an environment with two food sources, both subject to overexploitation. Environments which change over time either randomly or in a cycle can also maintain variability. The simplest model I know in which something like speciation can be seen to happen is one that contains two factors: There is a gene with two variants, and the heterozygote is worse than either homozygote. There is the possibility for evolving reproductive isolation based on the first gene. Reproductive isolation could be modeled in several ways. You could explicitly add a gene that controls mate recognition. You could arrange your simulated organisms on a grid and restrict most mating to near neighbors, and see if two populations separated from an initial mixture. Don't forget that if you use random rather than strictly proportional selection (that is, if you use a random number to see who lives and who dies), population size makes a huge difference. It is almost impossible to maintain high variability in a tiny population, even with strong selection. Von Neumann clearly chown that more complicated systems cannot come from less complicated systems. Information gets downgraded I got the Scientific American article (September 1964, vol 211) on interlibrary loan (too early for local holdings) to read Mathematics in the Biological Sciences. The lead in is: "Biologists use mathematics, but the complex systems they study resist mathematical description. The kind of description that might someday be helpful is suggested by the abstract analysis of self-reproduction." Note that this was before most of the developments in Chaos Theory, which does what they are talking about. Most of the examples in the article are concerned with modeling specific systems (neurons primarily), cellular automaton (see newsgroup comp.theory.cell-automata) and a couple of other systems. The relevance to evolution is not brought up until the last column on the last page. The applicability of the approach at all is questioned by the author, though the specifics are said to probably be possible. The last sentence: "Nobody has yet done the engineering design work required to build such a machine, but I think it will someday be built." Not exactly the posture of one "disproving" the concept, is it? I checked out the Von Neumann book Theory of Self-Reproducing Automata and am currently reading the fifth lecture "Re-evaluation of the Problems of Complicated Automata - Problems of Hierarchy and Evolution". The third lecture: "Statistical Theories of Information" brings in the thermodynamics issues as it related entrophy, enthalpy, and information. A worthwhile note is that Von Neumann points out that no local system is closed, and that local increases are easily accommodated by decreases elsewhere. A major disagreement that I have so far is the difference between the automata discussed and actual systems. 1. The cellular automata discussed are assumed to be in their final state. No further increases in complexity are apparently allowed. This is blatantly false in actual systems which continuously grow. 2. The descendants are perfect copies of the parents. In fact, this is one of Von Neumann's criteria in self-reproduction. In reality, (with the exception of very few EXTREMELY simple systems) the "child" is nowhere near as complex as the parent. As a major difference, the child is not capable of reproduction. Therefore, actual biological systems do not fit within the Von Neumann's definitions for self-reproducing automata. These two differences alone can account for evolutionary change without the need for a parent to produce (directly) a more complex child. The parent simply produces a LESS complicated child, which is NOT a replication of the parent, which then grows to a more complicated system than the parent. This can be observed happening when a tree produces seeds (which as-is are incapable of reproduction and are plainly NOT a duplicate of the tree) which in turn develop of themselves into a grove, which is more complicated (see Von Neumann's book on how he measures complexity - the editors introduction covers it in one place with examples as opposed to across numerous lectures for those in a hurry). Did you bother to read Theory of Self-Reproducing Automata? The fifth lecture is entitled "Re-Evaluation of the Problems of Complicated Automata - Problems of Hierarchy and Evolution". After a good bit of evaluation & discussion Von Neumann writes: "There is thus this completely decisive property of complexity, that there exists a critical size below which the process of synthesis is degenerative, but above which the phenomenon of synthesis, if properly arranged, can become explosive, in other words, where synthesis of automata can proceed in such a manner that each automaton will produce other automata which are more complex and of higher potentialities than itself." Further down this same page he discusses why a system of "less than a dozen kinds of elements are needed.". That system could come into being other than being constructed by a system designed to do so. Luck, for instance. A close comparison with Turing's machine is done on the next page. And one page further we get what appears to be an analogy to Mary's definition of life: "it might be quite complicated to construct a machine which will copy an automata that is given it, and that is preferable to proceed, not from original to copy, but from verbal description to copy." This "description" almost appears to be Mary's "language". Therefore, this entire string is fallacious. First, Von Neumann was not talking about the development of systems like those we observe (he said that was the case early in the quoted chapter), and those differences make the development trivial. And it turns out that EVEN WITH THESE AUTOMATA evolution (once past the simplest stage) is possible. ------------------------------------------------------------------------ No new species (alternately, "kinds") are evolving today. Three species of wildflowers called goatsbeards were introduced to the United States from Europe shortly after the turn of the century. Within a few decades their populations expanded and began to encounter one another in the American West. Whenever mixed populations occurred, the specied interbred (hybridizing) producing sterile hybrid offspring. Suddenly, in the late Forties two new species of goatsbeard appeared near Pullman, Washington. Although the new species were similar in appearance to the hybrids, they produced fertile offspring. The evolutionary process had created a separate species that could reproduce but not mate with the goatsbeard plants from which it had evolved. The article is on page 22 of the February, 1989 issue of Scientific American. It's called "A Breed Apart." It tells about studies conducted on a fruit fly, Rhagoletis pomonella, that is a parasite of the hawthorn tree and its fruit, which is commonly called the thorn apple. About 150 years ago, some of these flies began infesting apple trees, as well. The flies feed and breed on either apples or thorn apples, but not both. There's enough evidence to convince the scientific investigators that they're witnessing speciation in action. Note that some of the investigators set out to prove that speciation was not happening; the evidence convinced them otherwise. In 1916, a single pair of wallabies escaped from a zoo in Oahu. They survived and bred in the wild, and now there is a whole population. They are smaller and more lightly colored than the Aussie wallabies. They eat Hawaiian plants that are poisonous to the Aussie wallabies, because they evolved a new liver enzyme to detoxify them. They can no longer breed with the Australian wallabies, so they qualify as a new species. [Sources: "Instant Evolution", Science Digest, July 1982 Saladin / Gish debate at Auburn University at Montgomery, 24 March 1984] How can you say that no new species have arisen when dozens of previously undiscovered species are found each year in Costa Rica alone? Also, isn't the latest evidence that maize evolved about 4000 years ago? ------------------------------------------------------------------------ Slight variation can't turn one kind into another. "One lion may be fitter than another lion, but ... all his offspring will still be lions." What is a "kind"? ------------------------------------------------------------------------ Just because two animals LOOK similar does not mean there is "common ancestry" The interesting point is that, when checked, there IS. Genetic comparisons reveal (objectively) a kinship where it was before predicted on evolutionary grounds. I believe the error rate is less than 1%. What is fascinating about the comparisons of the numbers of genes shared between species is that when you draw a genetic tree of what species are related to what, it looks almost identical to the tree drawn by anthropologists who make their tree based on comparisons of morphology (humans look more like chimps than turtles therefore chimps are more closely related). This is the beauty of science that a hypothesis (relatedness of species) is shown by two completely differing mechanisms just as the age of artifacts can be determined by rock layers (those on top are newer) and carbon and other radioactive dating techniques. How is this done? In brief: DNA similarity is measured by mixing fragments of DNA from the two species and measuring the thermal stability of the resulting hybrid molecules, which is proportional to the degree of matching. It can be calibrated by using DNAs of known composition, for example the genomes of completely sequenced viruses. Accuracy is limited by the ability to measure the melting temperature and by the slight difference in stability between A-T base pairs and C-G ones. There has been heavy theoretical debate (ending in an amazing shouting match at a meeting last summer, alas--I was there, and it was embarrassing) about whether the method is accurate enough to resolve the chimp/ human/gorilla trichotomy. DNA similarity does measure overall composition, and two organisms could be very different morphologically while still having high DNA similarity (indeed, chimps and humans are much more dissimilar than most pairs with the same DNA distance). However, overall composition is probably a better guide to relatedness than specific genes, which are likely to be under different selection in humans and chimps. What is the noise, and what is the signal? "Junk" DNA is the most useful for determining phylogeny, because it is more likely to evolve in a gradual time-dependent fashion. Coding and controlling regions are interesting in that they tell us about the differences. ------------------------------------------------------------------------ Mendelian inheritance says that recessive characters reappear, and thus we should expect humans with characteristics of apes. They do. Tails, for instance. And other "ape" traits that happen to also be "human traits". Like toes, body hair, simian crease (XRHAH@scfvm.gsfc.nasa.gov for instance),... This disregards the basic mechanisms of natural selection and genetics. It makes the wrong assumption that ape-like characters are recessive and that all of the traits in the ancestor population are present but usually unexpressed in the supposed descendant population. Neither idea is true. ------------------------------------------------------------------------ There exist impossible gulfs between animal/vegetable, invertebrate/vertebrate, marine animals/amphibians, amphibians/reptiles, reptiles/birds, reptiles/mammals, mammals/humans. Eight impossible gulfs. Impossible to find gulfs. 1) Between the living and non-living or dead matter This is the abiogenesis debate. The rest is a taxinomy of man with the similarity argument turned into the gaps argument. Is the glass half empty or half full? What is this gulf? I have yet (despite looking and asking many) found it at all, let alone found it to be an impossible gulf. The spectrum between clearly living and singular elementary particles is wide, and not linear (few things really are) but it appears to be continuous. 2) Between the vegetable and the animal kingdoms Animal cells have some similarity with plant cells, and indeed there are forms, euglena, with cloroplasts and flagellae, that look like intermediates. Cells from both kingdoms are eukeryots that are distinct from other cell types belonging to at least three other kingdoms. There are quite a few plant/animals in the same creature. Most microscopic because a plant doesn't collect enough energy to be mobile in large scale. But there are plenty of small ones. What is a euglena? And where do protista & viri fit in here? 3) Between the invertebrates and the vertebrates; The vetebrates are biochemically closest to the echinodermata, and urochordates. The free swimming soft chord animals are similar to the sessile forms. See also sharks and squids. 4) Between marine animals and amphibians; A steady change from fish to lobefined air breathing fish to amphibians with fish like larval stages can be observed in extant species and in the fossil record. See also mudpuppies and frogs. An amphibian that never leaves the water is a marine animal. This gulf is not only impossible, it is non-existent. 5) Between amphibians and reptiles; Amphibians predate reptiles in the fossil record. The development of the amneonic egg, with shell and the difference in the skin of extant reptiles and amphibians suggests that the reptilian characters were adaptations developed on amphibian ancestors. The time in the fossil record when the reptiles became important was one when amphibian habitats were being reduced and when reptiles could have succeeded on drier continents. What is this gulf, and what was a dinosaur? (warning: trick question! Specifically what is the impossible gulf between, for instance, a salamander and a chameleon? 6) Between reptiles and birds; The ornithischia, with bird-like pelvises appeared before the modern birds, whch began to appear in Cretaceous time. Intermediates are known. 7) Between reptiles and mammals; The therapsida in permean time, Mammal-like reptiles appear before the first mammals, but intermediate forms are known, and a fairly complete record of the changes in the facial bones between these reptiles and true mammals is known from Permean time. Does anyone know if mammalian dentition is documented into this time. Did the Therapsida have differentiated dentition? 8) Between mammals and the human body; The distinguishing characteristic of living MAMMALS is lactation. Despite the invention of baby bottles, human females still lactate. ------------------------------------------------------------------------ The failure of some organisms to evolve at all. If it passes the selection filter, no change required. These organisms are excellently adapted to their particular niche in their environment. (like sharks: the "perfect eating machine", right?) Like the brachiopod Lingula, and the cockroach, identifiable through most of the phanerazoic and still with us. If an organism is well adapted to a niche it can readily occupy, then why should it evolve? ------------------------------------------------------------------------ No new phyla, classes, or orders have appeared. Subsequently to what? Trees of descent for organisms are drawn by grouping organisms together based on common features. Twigs which are close together are organisms which differ only in few and minor respects. Main branches, down at the bottom of the tree, are groups of organisms that differ in many and major respects. One of the main premises of evolution is that this tree is (more or less) proportional to time. Asking for a phylum to appear today is asking for a major branch to be up at the tip of the tree--it makes no sense, considering the way such trees are drawn! It is perfectly possible that in several million years there will be recognizable phyla which were just differentiating today, but there is no way to recognize a "new phylum" in the bud. For example, modern plants use two different photosynthesis reactions. It is quite possible that those two groups will eventually be so different that we will call them separate phyla, because the two reactions probably favor different evolutionary pathways. But how can we know in advance whether or not this will happen? That's what you're asking for when you want to see a new phylum arise today. This is just not true. while most of the phyla present today were present at the beginning of the Cambrian, and their origin is shrouded, there is enough of a fossil record from the so-called eo-cambrain to suggest that some of the animals found in Australia are different phyla that became extinct by the time fossils became abundant. The affinities of several Cambrian groups is by no means clear, and they might be separate phyla, such as the archeocyathids. Our phylum, Vetebrata (Chordata), appears no earlier than Ordovician, and then only the cartilaginous and jawless fish are known. All the other classes appear later than that. Vascular plants, and all more advanced plant phyla appear no earlier than Silurian time. There are now five kingdoms known, based on their biochemistry and there are enough precambrain microfossils to document their appearance. The geochemistry of sediments in Precambrain rocks is understood well enough to establish when the oxygen level of the biosphere was high enough to support modern plants and animals, that comprise two of the five kingdoms. Before this date it can be inferred that the Plant and Animal kingdoms did not exist. I am not familiar with Precambrain events to fix this date, 1.8 billion years B.P. ?, or to document the micro fossils that might bear this out. ------------------------------------------------------------------------ The occurrence of parallel evolution, in which similar structures evolve in quite different circumstances. If you start with the same ancestor, they can only vary so much. Also, what he thinks are "different circumstances" are not necessarily so. Physics has an interesting set of constraints... ------------------------------------------------------------------------ Many species have remained absolutely fixed throughout geologic time. There are no known examples of organisms that have not evolved over a period of time and this includes cockroaches, lungfish, lampreys, sharks, bacteria, and all other organisms that some people claim are "frozen in time". Some of these species appear to be morphologically similar to ancestors that lived in the past but evolution is much more than external appearance. When the structure of their genes and proteins are examined it becomes obvious that they have evolved at the molecular level. In fact the rate of evolution of these species is similar to that of species whose external appearance has changed more drastically. It is incorrect to claim that some organisms have not evolved simply because their external morphology has not changed. The problem here is that the fossil record only preserves some parts of an organism. The fact that these parts have not changed very much doesn't mean that the species has not evolved. ------------------------------------------------------------------------ A great many modern species are very evident degenerate, rather than higher, forms of those found as fossils. There is no hierarchy to evolution. There is no reason to suppose that modern organisms should be "higher" than extinct ones. Loss of a structure is just as much evolution as gain of one. If Creationists admit that some organisms have become "degenerate" then they are admitting to evolution. ------------------------------------------------------------------------ All the great phyla appear quite suddenly in the fossil record. Marvelous. As long as he gets to pick which ones he wants, they do. Collect the data to support you conclusion. Keep throwing out the outliers (97% discarded?) till it fits. ------------------------------------------------------------------------ Selection cannot change the frequency of variants Since evolution is, by definition, a change in the frequency of genes in a population, then this statement is equivalent to saying that selection cannot cause evolution. There are many experiments in the literature that directly demonstrate how false and ridiculous this statement really is. Perhaps the easiest examples for the non-biologist are those that involve human selection, as in breeds of dogs or cattle. In those cases selection for distinct characteristics has led to populations with differing frequencies of alleles (variants). Thus selection has been PROVEN capable of changing the frequency of variants or alleles in a population and we have every reason to believe that it did so in the past as well. Directional selection (selection "for" or "against" something) in a static environment will lose variation. To get a more interesting result, you can look at either of two things: 1. Selection which is not directional. Here are some examples: Frequency dependent selection. Forms which are rare are at an advantage. There are several decent real-world examples of this; female fruit flies prefer males who look "different", and animals which have immune system genes different from their neighbors' seem less likely to get diseases from them. Heterozygote advantage. The organism with two different forms of the gene has an advantage over others. The classical example is sickle-cell anemia in humans, where the person with one sickle and one normal allele is protected from malaria. Two kinds of selection pulling in different directions. For example, females may prefer brightly colored males, but so may predators. Some values for the parameters here will give a balance of different forms in the population. 2. Non-static environments. This is much harder to model, but interesting. You can easily get frequency-dependent selection out of an environment with two food sources, both subject to overexploitation. Environments which change over time either randomly or in a cycle can also maintain variability. The simplest model I know in which something like speciation can be seen to happen is one that contains two factors: There is a gene with two variants, and the heterozygote is worse than either homozygote. There is the possibility for evolving reproductive isolation based on the first gene. Reproductive isolation could be modeled in several ways. You could explicitly add a gene that controls mate recognition. You could arrange your simulated organisms on a grid and restrict most mating to near neighbors, and see if two populations separated from an initial mixture. Don't forget that if you use random rather than strictly proportional selection (that is, if you use a random number to see who lives and who dies), population size makes a huge difference. It is almost impossible to maintain high variability in a tiny population, even with strong selection. ------------------------------------------------------------------------ Mutations are never beneficial The textbook example of the effects of radiation upon genes is the old "carnation seeds exposed to radiocobalt". Clearly some of the flowers produced are prettier than the originals. Therefore, the "never" is disproved. Mutations are almost always harmful. Note: "almost". A lot can happen in a large population over long times. Mutations rarely occur. Note: "rarely". A lot can happen in a large population over long times. ------------------------------------------------------------------------ 3000 years was time enough for all languages, religions to develop. Actually the premise is false. The Sino-Tibetan family of languages is distinct from the Indo-European family of languages, which English seems to have been derived from. Considering how long ago the 50 arguments were written (was it around 1930?), this ethnocentrism is not surprising. ------------------------------------------------------------------------ Complex organs couldn't have arisen from a single mutation, and just part of the organ is useless. Favorite examples are eyes and insect wings. There have fairly good descriptions, on the net, of how eyes could have evolved, and of how bird lungs could have evolved. These were nice rebuttals of the claim that "it wasn't useful until finished, so it couldn't have got started". And how many of these "numerous coordinated innovations" can be caused by one change? Check out, for instance, the effect of changing the age at which bone growth stops in human beings. There are semi-venomous snakes, and in fact the issue was discussed earlier how some snakes "drip" the venomous saliva while ones with more developed systems "inject" the saliva via hollow teeth. Whales have semi-legs (ok, so they're not fish). How about the cooperating jawbones that have slowly become our hearing mechanisms, seen to be incrementally represented from reptilian jawbones. The complete developmental flowchart of the nematode worm--what cells divide to form what other cells all the way from the 1-cell egg to the thousand-cell adult--has been determined. It contains numerous examples of repeated tricks that look very much like subroutines. For example (this is from memory and may not be precise) there is a pattern of a cell dividing twice to form two muscle cells, one neuron and one cell which dies that occurs dozens of times in the worm's development, not always in exactly the same situation-- different kinds of nerve cells are produced--but with exactly the same pattern (that is, it is the most posterior cell which dies, and so forth). People often assume that to evolve a new structure requires new code. In this case at least, however, a new nerve with attendant muscle fibers could be made (and there are mutants which do this) just by triggering this subroutine in a cell which normally doesn't do it. ------------------------------------------------------------------------ The instinct of animals proves wisdom of a "higher order". Again, argument by design. The complexity and specialization of characters is evidence of a designer, in this view. Proves that it something stupid is wired in you don't get descendants. ------------------------------------------------------------------------ Hybrids are infertile, so a newly evolved individual couldn't breed. Hybrids are often not fertile or robust. They may be desirable to man if man amde, but they may not succeed in an evolutionary sense. The premise is incorrect. First, what is meant by "hybrid" is unclear in this context - is it a hybrid only if it is infertile? And even in those cases in which the offspring is usually infertile, that is not always the case. As witnessed the horse and the donkey. It is not individuals that evolve but populations. A population evolves by gradual changes in gene frequency until it becomes a distinct species that is no longer capable of interbreeding with similar populations that shared a common ancestor. All of the individuals within the population can mate successfully with each other so there is no problem with "hybrids". There are quite a few examples of different populations of the same species which have trouble interbreeding, in other words the hybrids are not viable. These populations are evolving and may become separate species. It is a common mistake to assume that a new species begins when an individual "mutates" or "evolves" in a single step - this is simply not how evolution works. ------------------------------------------------------------------------ Evolution doesn't explain personality, emotions, abstract reason, conscience, etc. Please read: The Evolution of Behavior Smith, Scientific American, Sept 1978 Xenopsychology R. A. Freitas, Analog Apr 81 Directly Interacting Extra-terrestrial Technological Communities Viewing, JBIS, vol 28, pp 735-755, 1975 Computer Simulation of Cultural Drift: Limits on Interstellar Colonization Bainbridge, JBIS, vol 37, pp 420-429, 1984 The Improbability of Behavioral Convergence in Aliens Behavioral Implications of Morphology Coffey, JBIS, vol 38, pp 515-520, 1985 The climatic background to the birth of civilization Lamb, Advancement of Science vol 25 pp 103 - 120 1968 ------------------------------------------------------------------------ "No people of English descent are more distantly related than thirtieth cousin," which doesn't allow enough time for evolution. Incorrect argument. The island population of Great Britian might well have interbreeded more than is the case if it were mixed with the rest of the world's human population, if you are inclined to believe Davenport's claim at all. ------------------------------------------------------------------------ The animals couldn't have distributed themselves all over the globe. This is written at the time Wagener proposed Continental Drift for the first time. He is rejected by the geologists of the day, but now Plate Tectonics is well accepted among geologists and is used to construct paleobiogeography that explains fossil distributions. And like horses (that man transported), camels, pandas, kangaroos, marsupials,.. In fact, this supports the evolutionary postulates in that the distribution matches transportation capabilities. What is more interesting is why are not animals everywhere? If they all got themselves originated from one place (did this twice, supposedly - everyone was originally present in Eden for the naming and everything was together again in the ark) why are not marsupials found everywhere? Ibid old world vs. new world species. The Supercontinent Cycle Nance, Worsley, & Moody, Scientific American, July 1988 Alfred Wegener and the Hypothesis of Continental Drift A. Hallam, Scientific American Feb 1975 ------------------------------------------------------------------------ Geographic Distribution of Quadrupeds Since the creationists (from the biblical account) would have had EVERY animal in the same place (twice, in fact. Once for the naming in Eden, once again for the rescue in the arc.) why are the quadrupeds distributed so differently? There are a number of large animals that are strictly on one continent, unless somebody moved them (in fairly recent recorded history). They could NOT have gotten there on their own RECENTLY (evolved there, yes), nor could a selective extinction removed every individual of the opposite set. Please explain: New World Only: Old World Only =============== ============= Sapajous (Monkeys) Horse, zebra sagoins (monkeys) sheep, goats, antelopes Opossum wild boar Cougar, jaguar panther, leopard Coatis hyena, civet Stinking weasels porcupine, hedgehog Agoutis apes, baboons, true monkeys Armadillos scaley lizard Ant-Eaters Sloths detached species detached species tapir elephant Cabiai rhinoceros Llama hippopotamus Peccary giraffe camel lion tiger ------------------------------------------------------------------------ Vestigial organs: "If the perfect organ were better than the rudimentary organ, how can man be the 'survival of the fittest'?" This is the appeal to progress and perfection that biases a lot of thinking about evolution, even by some biologists of the past. The changes seen are just adaptations of existing structures, not perfections or progress toward a goal. Note: "fittest" is not "optimal". ------------------------------------------------------------------------ Embryology: "it is hard to see why the history of the species should be repeated by the embryo." This is similar to the argument used by Bob Bales that it is hard to see evolution in the fossil or living evidence. The problem with this claim is that the understanding of what you would look for comes from first looking at living things, fossils, and in this case embryos. You must know how to describe these things in some detail before you can decide if the claims that similar structures indicate common ancestry, or that embryonic stages mimic ancestral forms. "It is hard ", means you haven't looked. Present an objection based on what all agree is evidence. That is more a function of his "hard to see" than why it does. ------------------------------------------------------------------------ A staggering speculation: essentially that evolution doesn't make sense given the lake of common animals between the major groups. This doesn't make sense. The "major groups" are defined by human classifications that often are there for ancestral reasons that support evolution (via the "family trees") or are fairly arbitrary (for instance, by location or discoverer) and make perfect sense. ------------------------------------------------------------------------ Evolution doesn't explain abiogenesis or how genes are expressed. To the creationists. And it does explain how to study the unknown, rather than bowing out. ------------------------------------------------------------------------ If life arose by chance, half of the amino acids should be right-handed; in fact, all are left-handed. Once the preference for one enantiomer over another gets started in nature, it is relatively easy to see how this preference is perpetuated. Biological reactions work much like machines having templates, stamping out the preferred, and ONLY the preferred configuration generation after generation after generation. As to how one became initially started, there are many possibilities: 1. Luck. The first one to form just happened to be L, and then the rest followed. 2. There may be some effect during formation due to coriolis force or the (hemisphere dependent) magnetic field (as lightening went DOWN, the effect may be polarized) 3. Quantitative calculations indicate that the fundamentally left-handed neutral-weak force with the electromagnetic force could introduce an energy preference (very slight). Aside from any steric preferences, one form could be energetically more stable than the other. [William C. McHarris Professor of Chemistry and of Physics and of Astronomy at Michigan State University "Handedness in Nature" January 1986 Analog] ------------------------------------------------------------------------ Mathematical probability: "it is so improbable that one and only one species out of 3,0000,000 should develop into man, that it certainly was not the case". Whence the 3,000,000 number, and how is the "improbability" assigned? Some say inevitable... If 500 developed into man, how would you tell? Besides, given the way evolution works, one would dominate and 499 would have (while developing) be suppressed, quite likely into extinction. The "less successful" are extinct or in zoos. ------------------------------------------------------------------------ The repeated occurrence of changes calling for numerous coordinated innovations, both at the level of organs and of complete organisms. First, how do you determine that "numerous coordinated innovations" are required? That may merely be your evaluation. For instance, some of the common examples: poisonous snakes - fangs & poison glands. A Gila monster has poison glands with no fangs, and there are snakes with furrowed fangs with no poison glands. fish to land animal - legs and lungs. The mudpuppy is a fish without lungs that goes on the land, and the ceoclanth (sp) has almost legs with no lungs. And then there is the African Lungfish, the floridian walking catfish,... Coral snakes (southern US) don't have a very sophisticated delivery system - they also chew on their victims to deliver the poison. I'm not very familiar with the anatomy of a coral snake, but it does not have the usual "fangs" associated in the popular mind with a poisonous snake - as I recall there is just a small sac or pore at the base of what look like ordinary reptilian teeth. The last time I studied poisonous snakes (some years ago), it was thought that poison delivery had evolved several times, independently, in snakes. This was based on differences in toxins and in delivery systems, as well as its occurrence in otherwise distantly related snakes, all of which have closely similar non-poisonous forms. The delivery systems cover the whole range from the simple, rather typical, teeth of the coral snake to the elaborate, retractile, tubular fangs of pit-vipers. Some have slightly elongate "fangs" with simple grooves on one side, for instance. Thus, we can see almost the entire range of intermediate anatomies in evolving fangs purely in living species. Gap?? What gap? We do not even need the fossils, which we also have. And how many of these "numerous coordinated innovations" can be caused by one change? Check out, for instance, the effect of changing the age at which bone growth stops in human beings. This needs to be elaborated. If a genome is being stressed to some metastable level where its states can multiply, then rapid changes to more than one structure in the organism can occur simultaneously. ------------------------------------------------------------------------ The puzzle of how organs, once evolved, come to be lost (degeneration). Evolution operating on the amplification and diminution of structures is well known. The appearance of vestigial structures, at all, reflects on the use of preexisting developmental pathways, rather than on the purposefulness or efficiency of the process. "Use it or lose it" is a popular expression which may help the understanding. Maintaining something is a drain on materials and energy. Selection would go against a disadvantageous drain. ------------------------------------------------------------------------ The speed at which evolution occurred varies. Why is that a problem? You change the mutation rate and the selection rate and the change rate also alteres. ------------------------------------------------------------------------ The existence of long-term trends (orthogenesis). So? Study any climatology? The environment has some VERY long-term trends. ------------------------------------------------------------------------ Pre-adaptation: Organs appear before they are needed. Now, how do you tell this??? ------------------------------------------------------------------------ "Overshoot" or evolutionary "momentum" occurs. A not uncommon problem with non-linear search routines, and with systems with very long delay times in the feedback. ------------------------------------------------------------------------ Why did man lose his hair and tail? Note that hair and tails ARE still present. The selection process is a statistical phenomena. There is a theory that sometime within Man's evolutionary past he had an aquatic phase. This is upheld by: The layer of fat beneath the skin is more characteristic of marine mammals. The pattern described by the hair remaining on the body describes fairly closely what would be a flow pattern. Also, the pattern of denser hair (top of head, chin, pubic region) matches the marine growth areas Humans have a diving reflex like that of the semi-aquatic mammals that live in cold climates. When the face hits cold water, the entire metabolism slows and the interior distribution of the blood flows. This has been observed in numerous near-drownings in cold water (it doesn't seem to cut in on warm water). Thus, we have the same amount of hair (almost) as any other marine mammal. And for the exact same reasons. We just didn't have a long enough marine phase for further adaptations (lose arms & legs). ------------------------------------------------------------------------ Over-specialization with no adaptive value. How do you determine this? Besides, most nonlinear search routines I am familiar with have a tendency to overshoot... The process is not particularly efficient or purposeful. ------------------------------------------------------------------------ Can this all be just mutation and natural selection? Two points: first, although Darwin invoked only variation and selection, modern evolutionary theory also gives a very important role to genetic drift, the occurrence of changes due to chance fluctuations in small populations. This force can work in the opposite direction than selection, and can override selection if the population is small enough. (Brown mice do better in the wild than white, but if I start with only two of each in an area I will end up with only whites some of the time.) Second, "mutation" can cover some things which are much more powerful than single changes in genes--specifically duplication of genes and merging of two genes into a new one. These mechanisms can produce new yet highly non-random genes. ------------------------------------------------------------------------ The scientific discovery (not creationtific discovery) a few years back that mitochondrial DNA was identical in all people of various ancestry and thus showed that mankind arose from one female. First, mitochondrial DNA is NOT identical in all humans. However the differences can be used to construct a family tree of sorts, and the most reasonable interpretation of the data is that all modern humans inherited their mitochondria from one woman, dubbed Eve (possibly to bait creationists), who lived (I think) around 200 Kyears ago. (The mutation rate observed for the mitochondrial DNA was used to establish the times involved.) Second, the fact that the mitochondria of all of us can be traced to one woman does not mean we arose solely from her-- it just means that she's one of our common ancestors. The maternal inheritance of mitochondria is analogous to the inheritance of last names in our paternalistic society. The point is, there may have been many contemporaries of "Eve" who are also common ancestors of ours-- she just happens to be at the node of our common maternal line. If a consistent paternalistic society had existed throughout human history, (and nobody ever changed their names) we would probably all have the same last name; this would not mean that the first man to have this name was solely responsible for the human race, just that he would be at the node of our common paternal line. ------------------------------------------------------------------------ Chaos Theory As far as the brain obeying certain chaotic processes, the brain is too structured and controlled to allow anything like that to occur. Biological processes are very closely controlled in the body and in the brain. That is necessary for survival. Reflexes are something the brain cannot control. Your heart beats regularly and you breathe in your sleep. Your brain releases hormones at just the right moment to allow you to run away from a lion, or, when cornered, fight off an attacker with more strength than you thought you had. When you consider the mind as it is usually defined (the thinking, conscious part of the brain), it must also function properly at all times, or you would not be able to survive. Evolutionary pressures would not favor a mind which works on a process based on chaos theory. The connection of chaos with complex real living systems is circumstantial, but suggestive. I do not have a firm demonstration that full-blown living processes are adequately described by systems of nonlinear differential equations. Two examples I have heard about, I do not have references, are human brain waves can be modeled with a strange attractor, and a good model of cardiac electrical function and sudden failure has been built using chaos. ------------------------------------------------------------------------ The fundamental principle of evolution - the concept of development, with increasing organization and complexity - seems to be essentially contradictory to the impregnably established laws of energy conservation and deterioration. Huh? If by "development" he means adaption to the environment I have no idea what "increasing organization and complexity" is fundamental for. And maybe by "deterioration" he means "entrophy or enthalpy"? ------------------------------------------------------------------------ There is not the slightest genuine evidence of biological life as we understand it anywhere else in the universe. There are a LOT of complex chemicals of extraterrestrial origins composed of carbon, hydrogen, oxygen, and I think even a bit of sulfur. And the Viking has found some odd reactions. And if you don't mind taking environmental conditions more alien than mars as "elsewhere", I have seen some dandy pictures of things that sure look like life in eternal blackness, no oxygen, hotter than a pot of boiling water,... ------------------------------------------------------------------------ Vestigial organs are probably the results of mutational changes which, as we have seen, are usually deteriorations. Also know as "adaptions", right? Thanks. Whale legs are definitely an adaption to their current environment. Thank-you. ------------------------------------------------------------------------ Embryology, instead of supporting evolution, actually offers abundant testimony to a great Designer and does not in any way give countenance to theories of materialistic origin and development. How odd... Same data, different conclusion. ------------------------------------------------------------------------ Similarities (embryology & comparative anatomy) are more reasonably explained in terms of origin at the hand of a common Designer. An odd definition of "reasonable"... ------------------------------------------------------------------------ What is known to be true about evolution? I am not sure what you mean by "KNOW". None of this is divine revelation. But I am as sure about the statement "There is plentiful genetic variation in natural populations", having worked first-hand with the data supporting it, as I am of just about anything else in the world. And I am as sure of the statement "Selection can change the frequencies of variants", since I've done computer simulation to test it. That's most of evolutionary theory right there. ------------------------------------------------------------------------ Why are men alone so murderous of their own species? We are not alone. Most social animals seem to have some similar sorts of behaviors. When a male baboon displaces the old dominant male, young baboons must watch their ass, as the new dominant male will often attempt to kill them. The same thing happens with lions, I believe. ------------------------------------------------------------------------ We have never seen any natural processes which result in a complexity increase. This is easy. Are you familiar with a small creature called a "Volvox"? This is a small spherical animal that lives in the water and is made up of individual cells of algae. Separate algae cells have been observed organizing into a Volvox, with the advantage of being able to propel itself in a way similar to an octopus, and capture food inside the sphere. The algae cells operate in a unified manner, just as the cells in a larger organism do. Here is a clear example of increased complexity for the sake of survival. Since mutation is factual (i.e. we have observed mutation, so it is not conjecture), why do you find it so hard to believe that increasingly complex organizations of cells, combined with favorable mutations, can result in a higher form of life? I have a biological example. The cat in my house has a pair of extra toes growing inward on both of its forepaws. This is not unknown, and I have seen it before. Even more interesting, I have seen the cat use those extra toes as a human would use a thumb to grip small objects, such as a penny, in a manner that a cat with ordinary forepaws could not. A new part, adapted from an old part that all others of the species has. A new ability that others of the species doesn't have. An increase in complexity in a biological context. jap2_ss@uhura.cc.rochester.edu ------------------------------------------------------------------------ There are gaps in fossil record where you'd expect intermediate forms. There are more fossils than Creationists will admit. Many intermediate forms are known--for example, the development of the mammal skull characteristics from the therapsida of Permian time. What gaps remain can be explained by erosion, lack of proper conditions for fossilization, the punctuated equilibrium model, or simply not looking in the right places yet. ------------------------------------------------------------------------ Methods of dating the earth are inaccurate. Exactly what is meant by "inaccurate" leaves much to be desired. Please see the August 1989 Scientific American article on the Age of the Earth. (page 90, by Lawrence Badash, "The Age-of-the-Earth Debate") In an abstract from Nature, Vol. 341, p. 518 (12 October 1987). "Direct dating of Phanerozoic sediments by the 238U-206Pb method," by Patrick E. Smith & Ronald M. Farquhar, Geophysics Laboratory, Department of Physics, University of Toronto, Ontario, Toronto, Canada M5S 1A7 "Direct radiometric age determination of Phanerozoic carbonates has been a long-standing problem in geochronology. Rb-Sr and K-Ar dating schemes, commonly used to constrain the chronology of Phanerozoic sediments, have so far proved to be unsuccessful in dating these rocks because of their poor enrichment in radiogenic 87Sr and 40Ar and also because of analytical difficulties. Recent studies have demonstrated that large amounts of radiogenic Pb exist in some carbonates and that they could be dated by the Pb-Pb method. However, the precision of this method is severely limited to samples having very high uranium to lead ratios because by the beginning of the Phanerozoic (~590 Myr ago) 98% of 235U originally present in the Earth had decayed to 207Pb. Here we report the first isochron age of carbonates using the 238U-206Pb method on corals. This method, which gives good accuracy even for low U concentrations, has great potential for the direct dating of sedimentary sequences and should be valuable for refining the Phanerozoic timescale." ------------------------------------------------------------------------ K-Ar dating of Hawaiian lava is wildly inaccurate. That's why geologists don't pay much attention to analyses of rock samples unless their geological context is well understood. Since Hawaii is built on oceanic crust that is about 80-100 million years old (the age is known more precisely than this; I don't have the references handy), it was immediately obvious that the observed isotopic ratios didn't represent the ages of the rocks. Our confidence in radiometric dating techniques comes from years of careful comparisons to other radiometric techniques and to relative age determinations from biostratigraphy (fossils in layered rocks). In some cases, there are multiple isotope systems that may be analyzed in the same sample. Since these different systems react differently to the processes that disturb age recording, if the systems disagree with one another the age significance of the data is suspect. Geoscientists try to use all available tools in combination to make sure that they're not fooled by a single spurious analysis. In some journals, analytical results aren't publishable unless they're backed up by field relations and/or by other analytical methods. The particular case of young Hawaiian volcanic rocks is interesting for reasons other than the absurd age interpretations. Since these rocks are very poor in the potassium from which radiogenic argon decays, their argon content is determined largely by the composition of the argon in the rocks from which the Hawaii lavas were derived. The data tell us something about the composition of the mantle down to about 150 kilometers below the surface, where earthquake data tell us the lavas originate. The example of the Hawaii rocks is a Red Herring, as I will demonstrate momentarily. However, the answer to your last question is very simple. If you can date a rock by a number of different methods, involving different decay series, and if you arrive at the SAME AGE using any of a half-dozen different and completely independent methods, then you can be quite confident that the age you have measured is reliable. If you wish to dispute these ages, you have to come up with EVIDENCE that they are unreliable. It is not sufficient to wave your hands and express your skepticism. We all know you are skeptical, but saying "how do we know," without EVIDENCE to suggest that there is a problem, is just whistling past the graveyard. And now for the Red Herring. Creationists often bring up the example of the Hawaiian pillow basalts with anomalous K-Ar ages, but they neglect to mention that geologists already thought that rocks formed under THESE PARTICULAR conditions would give unreliable K-Ar ages because they would trap argon before it can escape. The studies in question were performed to confirm this under controlled conditions, and thus to confirm to the scientific community that THIS PARTICULAR type of rock is unsuitable for radiometric dating. The misuse of this work by Creationists is particularly despicable, IMHO. ------------------------------------------------------------------------ Erosion should've dumped at least 30 times more sediment in the sea. and all the continents would be worn to sea level in just 14,000,000 years. Ever heard of plate tectonics? Please read: On Volcanism and Thermal Tectonics on one-plate Planets Solomon, Geophysical Research Letters, vol 5, no 6 June 1978 The Supercontinent Cycle Nance, Worsley, & Moody, Scientific American, July 1988 ------------------------------------------------------------------------ Top soil--6 inches form in 5,000-20,000 years, but earth averages 7 to 8 inches. Or erosion. Your county Soil Conservation Board will be happy to tell you why your topsoil is getting shallower, and what you can do to curb the problem. ------------------------------------------------------------------------ Mississippi delta would have formed in 5000 years. So? You have (given a steady-state system which it is NOT) identified a possible geographic feature less than 5k years old. ------------------------------------------------------------------------ Niagara Falls-the rim is wearing back at a known rate and taken ~5,000 years from its original precipice. That's neat - and the steady-state assumptions are? And how did you get the "original precipice" without deciding up front how old you wanted it? The Niagara River HAS been where it is for only a few millenia (or tens of millenia). Before that, the whole area was under glacial ice! (And it some millenia after the ice retreated for the land to reach its present level and the drainage paths to reach their present alignment. I'd love to see what happens in the year the falls erode back to Lake Erie! At the present rate of erosion, I think that's supposed to be ~100,000 AD. ------------------------------------------------------------------------ Deterioration of earth's magnetic field, at present rates, implies an excessive field 10,000 years ago. The decay is not a steady state (you love this - Morris does, too). In fact, there is considerable evidence for reversals. The atlantic ocean floor as it spreads shown the weakening - reversing - strengthening recorded in its stone as the continents spread from the mid-atlantic ridge. The usual creationist assumption behind this extrapolation is that the decay is exponential, which excludes the possibility of field reversals. The limited existing measurements cannot yet distinguish between exponential, linear, or other decay patterns. The source of the earth's magnetic field remains uncertain. A good summary of what is known is found in "Ancient Magnetic Reversals: Clues to the Geodynamo", SCIENTIFIC AMERICAN, May 1988, p. 76-83. The field is expected to reverse sometime in the next few thousand years. A time scale on page 78 shows the reversals over the past 170 million years, as deduced from the magnetic patterns in oceanic crust. I counted about 200 reversals on the chart. The sun reverses its magnetic field every 11 years in a 22 year cycle. ------------------------------------------------------------------------ Not enough dissolved minerals in oceans. Dissolved minerals - the stuff moves in cycles, and as such most of the minerals are very close to their balance levels. Remember "carbon cycle"? The same general idea holds for everything else. Remember the space shuttle? Except for the last time, it has been landing on salt. Like from the oceans, remember? ------------------------------------------------------------------------ Other "geological clocks" that suggest a "young" earth- juvenile water (from volcanoes), oil deposit pressure, Stalactite Growth (limestone) Juvenile water is covered in those same computer models, and again nothing tricky is involved at all. Oil deposits themselves require a time well over 6000 years to exist, so try again. Stalactite growth - of some, perhaps. You are still identifying merely temporary features Please read: The Formation of the Earth from Planetesimals Wetherill, Scientific American June 1981 The Steady State of the Earth's Crust, Atmosphere and Oceans Siever, Scientific American, May 1974 The Evolution of the Atmosphere of the Earth Hart, Icarus, 33, 23-39, 1978 Evolution of the Atmosphere and Oceans Holland, Lazar & McCaffery, Nature vol 320, 6 mar 1986 Enhanced CO2 greenhouse to compensate for reduced solar luminosity on early earth Owen & Cess, Nature, vol 227, 22Feb 1979 How Climate Evolved on the Terrestrial Planets Kasting, Toon, & Pollack, Scientific American, Feb 1988 Climatic Changes of the last 18,000 years: Observations and Model Simulations COHMAP members, Science vol 241, 26 Aug 88, p 1043-1052 ------------------------------------------------------------------------ Polonium halos indicate granite-producing magma cooled suddenly, not over millions of years. Gentry's work is of particular importance because it involves actual field and laboratory work followed up by papers appearing in refereed scientific journals, offering some credibility to the field of "creation research." There is, however, a serious weakness in Gentry's work. It has been devoted almost entirely to the physics of the polonium halos, thereby neglecting the geological setting of the samples in which the halos are found. Because of this neglect, Gentry makes unwarranted generalizations about the nature of the world's Precambrian rocks. THE BASIC PREMISE Polonium halos are small spherical "shells" of radiation damage that surround radioactive inclusions within certain minerals in rocks, which Gentry has described in his book "Creation's Tiny Mystery." [1] The halos are formed by alpha particles released during the decay of an isotope. As an alpha particle nears the end of its path and slows, it causes disruption of the crystal structure leaving a small damage track. Over time, repeated decays from the parent isotope will leave a spherical halo of discoloration. The distance that an alpha particle travels depends upon the energy of the decay and that, in turn, is a function of the particular nuclide that decays. Theoretically, then, the radii of a series of halos that surround a radioactive inclusion permit identification of the specific decaying nuclides. Gentry has claimed that certain of these halos indicate that the granite "basement rocks" of the earth are "the primordial Genesis rocks" and were created instantaneously about six thousand years ago. Essentially, Gentry has found that in certain samples of Precambrian biotite (a mica) the inner ring halos for uranium and other nuclides in the decay chain which should be producing Polonium 210, Po214 and Po218 are missing; only the polonium rings for these three isotopes are present. In addition, Gentry observed little or no uranium in the radioactive inclusion. His conclusion is that the polonium must have been primordial and, because of the short half-lives of the polonium isotopes (138.4 days , 0.000164 sec. and 3.04 minutes, respectively), the granite, therefore, must have been created in the solid state in "only a brief period between 'nucleosynthesis' and crystallization of the host rock." [1, p. 270] The fact that Gentry has published in Nature, Science and Medical Opinion and Review leads one to believe that there is a fair amount of support for his work, but Gentry avoids making direct creationist statements in these works -- it seems he is only cautiously trying to link the rocks of the Precambrian to the rocks that existed right after the Earth's formation - or creation. His book, however, leaves no doubt on his position: "Were tiny polonium halos God's fingerprints in Earth's primordial rocks? Could it be that the Precambrian granites were the Genesis rocks of our planet?" [1, p. 32]1 THE GEOLOGY The first curiosity that Wakefield uncovered was that the sites from which Gentry obtained his samples were not in the older Archean era of the Precambrian, as one would expect, but in fact were in the considerably younger (as dated radiometrically and structurally) Proterozoic era; specifically, the Proterozoic Grenville Supergroup of the Grenville Province, here in Ontario. This misunderstanding came about because Gentry is annoyingly vague on exact sites in his book. One mine, the Silver Crater Mine, is mentioned specifically, while the remaining sites are described only as being in Madagascar, New Hampshire and Norway. This tendency towards vagueness also occurs in his Medical Opinion and Review article, in which he refers to "the Wolsendorf (Bavaria) fluorite." [2] After some research, Wakefield tracked down the three sites, all near Bancroft in southern Ontario. Regarding the first site, the Fission Mine, it appeared to Wakefield that this was where Gentry obtained his fluorite samples and some of his biotite. Gentry denied this, saying they had come from Germany, but Louis Moyd of the National Museum in Ottawa indicated that samples from the Fission Mine were in fact sent to Gentry. I will break tradition briefly and quote Wakefield exactly, "it is clear we are dealing with intrusive calcite vein dikes (rocks containing mostly the mineral calcite and other minerals, such as mica) that are small in length and width and cut metasedimentary rocks which still retain bedding planes. Radioactive minerals abound in this locality. Percolating water from the hill the deposit occupies is strongly radioactive and was sold in the 1920s for therapeutic purposes." The second site, the Silver Crater mine, is related to the Fission mine and is a calcite intrusive of the same origin. Neither of these mines are in fact granites, a fact Gentry gets wrong. In addition, while Gentry claims that "halos occur in many mica samples which have not undergone metamorphism of any kind," the micas of the Silver Crater were indeed formed during metamorphism under the load of moderate-depthed overburden, whch has since been eroded off. Gentry's primordial biotite was in fact metamorphically derived. The third site, the Faraday mine, I will touch on only briefly. Gentry emphasizes that the oddity of the halos is that there is no uranium or thorium in the nucleus at the center of the polonium halos. Unfortunately for him, the Faraday pegmatite was mined for uranium -- a total of some four million tons of U(3)O(8) ore were mined for a total of 7.3 million pounds of uranium oxide until the mine's closure in 1984. The most common radioactive mineral was uranothorite, hence lots of uranium and thorium. Gentry's case rests heavily on a "God-of-the-gaps" approach to the halos; that is, it requires that there be no acceptable naturalistic explanation for the halos. Once such an explanation is found, Gentry's case crumbles. One paper that proposes such a naturalistic explanation is by N. K. Chaudhuri and R. H. Iyer [3]. I make no pretense about being able to understand the model they present; perhaps those with the necessary background will help out here. Gentry also has problems with accuracy in his quotation of other scientific sources. In one case, Gentry (p. 71) refers to a paper by N. Feather [4], saying that Feather discusses "clear mica (without any conduits)," but there is no reference to this in Feather's paper. In another instance, Gentry quotes Steven Talbott for scientific support and provides a copy of Talbott's article in the appendices of his book, but Talbott himself states that he has relied on two sources for HIS information: phone calls with Gentry and "the available technical literature", which turns out to be based on Gentry's own articles. What Gentry has in essence done is to reference himself and attempt to pass this off as independent corroboration. [1] Gentry, R.V., 1986. Creation's Tiny Mystery. Knoxville, Tenn. Earth Science Associates. [2] Gentry, R.V., 1967. "Cosmology and the Earth's Invisible Realm." Medical Opinion and Review. October, p. 79. [3] N.K. Chaudhuri and R.H. Iyer, "Origin of Unusual Radioactive Halos," Radiation Effects, 1980, vol. 53, pp. 1-6. [4] N. Feather, "The unsolved problem of the Po-halos in Precambrian biotite and other old minerals," Comm. to the Royal Soc. of Edinburgh, no. 11, 1978. And for a more recent: In the 6 October 1989 issue of SCIENCE magazine (Vol 246, #1 pp 107-109), there is a report on work with Radiation Induced Color Halos (RICHs) in quartz, suggesting a mechanism for the "Po halos" that removes their utility as Creation Science evidence. The abstract and first two-and-a-half and last one paragraphs of the report, giving a summary of the problem and the authors' conclusion: ABSTRACT "The radii of radiation-induced color halos (RICHs) surrounding radioactive mineral inclusions in mica generally correspond closely to the calculated range of common uranogenic and thorogenic alpha particles in mica. Many exceptions are known, however, and these variants have led investigators to some rather exotic interpretations. Three RICHs found in quartz are identified as aluminum hole-trapping centers. Whereas the inner radii of these RICHs closely match the predicted range of the most energetic common alphas (39 micrometers), the color centers observed extend to 100 micrometers. Migration of valence-band holes down a radiation-induced charge potential might account for these enigmatic RICHs. Such RICHs provide natural experiments in ultraslow charge diffusion. "In 1907 Joly pointed out that microscopic color halos commonly observed surrounding small inclusions of radioactive minerals were caused by damage produced by alpha particles emanating from the inclusions. Shortly afterwards, Rutherford noted a close correspondence between the radial size of halos and the energies of the alpha particles. A number of workers have described and measured these radiation-induced color halos (RICHs) and, from their sizes, have tried to match them with specific radionuclides in the inclusions. Although it seems possible to relate the sizes of most of the described halos to alpha emitters in the U and Th decay chains, there are many exceptions. Particularly controversial have been two (perhaps artificial) classes of RICHs referred to as Po halos and giant halos. "The Po haloes are RICHs that have a size and ring structure apparently comparable with the range in silicate minerals of alpha particles emitted by uranogenic Po radioisotopes of mass 210, 214, and 218, although this interpretation has been challenged. Significantly, rings that can be attributed to the other five alpha decays in the 238-U seroes seem to be lacking. That the half-life of 218-Po is 3 min has not deterred some investigators from proposing separation of Po from its radioactive progenitors before its inclusion in minerals. Indeed, Po halos have even been offered as possible evidence of an instantaneous creation. "Giant halos are anomalous RICHs that have radii extending more than approximately 47 um from the edge of the inclusion..." [Their proposal is that aluminum inclusions can create a semi-conductive area where beta particles can cause diffusion and discoloration over a very large area] "...We strongly suspect...that the sizes and structure of giant and Po RICHs in mica are also artifacts of radiation-induced conductivity and their explanation requires neither unknown radioactivity nor an abandonment of current concepts of geologic time." ------------------------------------------------------------------------ In some places older fossils appear above young ones. Lewis Overthrust, Northern Montana, Glacier Nat'l Monument. Lewis Overthrust, Northern Montana including Glacier Nat'l Park Here inorder to explain the problem of much older fossils superimposed on much younger rocks we have a massive sheet of rock 6000 ft+ thick and 100+ miles long moving some 65 (or more) miles with no trace of friction or distortion... EVEN THOUGH THE ROCKS THEY REST ON ARE CRETACEOUS SHALES AND MUDSTONES WHICH WOULD SHOW DISTORTION QUITE EASILY! In "The Rocks and Fossils of Glacier National Monument", U.S. Geological Survey Professional Paper 294-K (1959) C. P. Ross and Richard Rezak note: Most visitors, especially those who stay on the roads, get the impression that the Belt strata are undisturbed and lie almost as flat today as they did when deposited in the sea which vanished so many million years ago. Actually, they are folded, and in certain places, they are intensely so. From points on and near the trails in the park, it is possible to observe places where the Belt series, as revealed in outcrops on ridges, cliffs and canyon walls, are folded and crumpled almost as intricately as the soft younger strata in the mountains south of the park and in the Great Plains adjoining the park to the east. Ross and Rezak repeatedly show how "crushed and crumpled" the rocks in the thrust fault are: The intricate crumpling and crushing in the immediate vicinity of the main overthrust, visible in localities like that near Marias Pass, (shown in figure 139), must have taken place when the heavy overthrust slab was forced over the soft rocks beneath... In some places only a single fault surface formed, with crushed and crumpled soft rocks beneath... Rocks between these faults were crumpled and crushed in a variety of ways. In some places the zone in which fracturing occurred was as much as 2000 feet thick; generally it must have been at least several hundred feet thick. The statements made by you that there exists "no indication of friction [?] or structural distortion in either the Lewis thrust plate or overridded [sic] surface!" and "In order to explain the stratigraphic imposibility [sic] of such older rocks over younger rocks thrust model is invoked" (don't they teach grammar at the Colorado School of Mines?) is misleading at best and an outright lie at worst. I'm trying to decide if you are ignorant or just plain dishonest. If you'd like to see photographs of the actual thrust fault which we are discussing, may I suggest that you examine the December 1988 issue of the Geological Society of America Bulletin? I'm sure your library receives it. While it is true that the thrust fault is often described as being "knife sharp" and there is little structural distortion above and below it, the fault is undoubtably present. You can walk up to it in places and place your hand on it. The thrust model, as you put it, was not just invoked without any supporting evidence. Geologists, unlike creationists, gather data and use it to support their theories. While the actual mechanics of overthrusting may still be poorly understood, geologists are making progress in understanding it (there have been hundreds of papers published on it). ------------------------------------------------------------------------ Heart Mountain, north of Cody WY If you believe that a large block of limestone could be moved uphill for that distance without becoming pulverized I have some land in Fl. you would be interested in... Or would you be more interested in the Brooklyn Bridge? aka Heart Mountain, north of Cody WY A huge mountain of Paleozoic limestone setting on top of Eocene/Miocene clastics... no indication of friction... no indication of pulverization... yet in order to avoid the failure of uniformitarianism geologists predict that this "block" of material was broken off from Sunlight Basin and moved by the vibration of volcanic eruptions over a 3000 ft. structure (the Dead Indian hill block fault) for a distance of over 25 miles. "in order to avoid the failure of uniformitarianism" is a biased judgement that does not address the issues, I will ignore it. William G. Pierce in his article "Heart Mountain and South Fork Detachment Thrusts of Wyoming" in American Association of Petroleum Geologists Bulletin Vol. 41 (1957), notes that the level Cambrian strata broke off along a bedding plane, and slid downhill. The thrust block slid over younger rocks, parts of the thrust block eroded away, and a volcano finally deposited some debris over the area where a piece of the block had once stood. The volcanic debris, not being a part of the original thrust block, never slid. Pierce also notes that the thrust block strata are often grossly deformed even when the underlying strata are not. He shows how the strata from one piece of the thrust block are often sliced across at a slant, forming an angle with the horizontal strata underlying the thrust fault. If you will allow me to quote from Strahler's book Science and Earth History (Note: Bill Jefferys mentions this book frequently. I advise everyone who reads this group to run not walk to the library and GET it. It would be most useful for Bob Bales and Joe Applegate to read this. Challange to Bob Bales. I will read any creationist book you wish me to, and post a critique to the net if you will read this book and post your critique of Strahler. Why do I think Bob won't take up the challenge?) From Chapter 40 page 393: For reasons as yet undetermined, the entire layer of post-Cambrian strata simply began to glide as a unit southeastward over a bedding surface located immediately under the massive Bighorn dolomite formation of Ordovician age and above the topmost Cambrian formation. This layer detached itself along a vertical breakaway fracture shown at the left. Movement was evidently on a very low downgrade, decling some 650 meters in elevation from the breakaway fracture to the end of the bedding slip zone, a horizontal distance of some 50 km. As the rock sheet traveled, it broke up onto blocks on a succession of vertical tension fractures. The blocks thus became separated by open gaps, in which the bedding plane of gliding (identified as the Heart Mountain fault) was exposed at the surface. Geologists have applied the term "tectonic erosion" to the surface exposure of a fault plane by sliding away of the overlying mass. So it seems 1) it didn't move uphill as you claim. and 2) there was pulverization of the rocks. ------------------------------------------------------------------------ These are just two of the unconformities which are unexplainable by the uniformitarian model on which the evolutionary model is based... But the point is, whenever one small area is undisturbed, its fossils are found in a very definite order from top to bottom. The fossils close to the top resemble modern species far more than the fossils closer to the bottom. When fossils are occasionally found in the "wrong" order, one finds that the rocks are in disturbed areas like mountain ranges, where the sediments are being squished up and out over the surface of the earth like an ice cream bar crushed in a vice. These mountain sediments show plenty of physical evidence of overturning and overthrusting that has nothing to do with fossils. Therefore, geologists who avoid overturned rocks when they determine the fossil sequence are not committing circular reasoning. William Smith, a canal engineer, was the father of modern stratigraphy. He was the first to notice that the higher rocks consistently had different fossils than the lower ones did. He was also a creationist, and used his discovery only to make money, yet the whole of geology today is based on his discovery. Geology is self-correcting, so of course, there is always an infinitesimal chance that it will someday contradict evolution, or perhaps render evolution a poorer explanation of the evidence than creationism. It will no doubt take something a bit more serious than the anomalies Joe mentioned here. We're still waiting. ------------------------------------------------------------------------ A near planetary collision or an asteroid impact could do a lot of geomorphic change! And geologically overnight! Yeah, and it would probably kill everything, given the size it would have to be. see national geographic, june 1989, 'the march toward extinction', p. 662, especially the chart starting on p. 666. ------------------------------------------------------------------------ Shifting the poles rapidly over Hapgood's waveguide zone would be just as effective and fast! What's wrong with the possibility of shifting them slowly? ------------------------------------------------------------------------ Carcasses deposited in icy mucky dumps. Evidence of rapid removal and deposition of soil, forest in arctic. ...the evidence plainly points to the removal of large areas of soil and forest along with their rapid deposition and freezing in the arctic... now what besides a tidal surge of immense proportions would do that... and if such a surge wiped the face of Asia and Alaska, why is it unlikely to extend it to Mesopotania, where it would have depositied it's debris in the vicinity of Ararat! Severe temperature changes are known to be responsible for great catastrophic mortalities. Such mortalities are typically associated with unusually cold spells or severe winters. Severe storms are also responsible for catastrophic kills and quick sedimentary deposition. During hurricanes and other severe storms, bottom sediment can be stirred up to a considerable depth and easily bury animals. There is absolutely no question that modern day catastrophes are constantly occurring and that many of these can result in catastrophic kills and rapid deposition of sediment. In short, fossils and fossil graveyards are being formed today. You may be correct in assuming that the evidence of rapid deposition you cite is generally evidence for some catastrophic mode of formation, but you are incorrect in assuming that only the Genesis Flood can account for such deposits. Especially in the face of the great amount of other evidence in direct conflict with the Genesis Flood hypothesis, evidence of slow deposition, evidence in coral reef formations, evaporite deposits, fossil lake deposits, glacial deposits, and desert deposits. When we look at the sedimentary rock record we find some deposits that bear evidence of having been formed by moving water and could have been formed in flood water, but by no means are all rocks like that, in fact there are a considerable number of formations that could not have formed in surging flood waters at all. ------------------------------------------------------------------------ There are no layers which require more than 6000 years to build up What about the abyssal plain ? the Greenland icecap Green River Plus, at the satellite-measured recession rate of the NA continent, the Atlantic gets a Real Big age. This is consistent with the mag stripes alongside the mid-Atlantic ridge. ------------------------------------------------------------------------ A while back I heard a Southern Baptist preacher declare that no more fossils were being formed because the rate of sediment deposition today is too slow to capture and preserve anything. This, he said, is proof that the flood happened because that would have been the only time the rate of sediment deposition would have been high enough to make fossils. (I didn't bother to ask him how he explained the layering of fossils, but I'm sure he would have used some variation of the idea that the larger fossils naturally floated to the top and the small ones settled to the bottom.) There was a bit of wondering going on amongst the dinodiggers on why so many fossils of a particular type had a specific distribution, especially when that distribution was of a single kind, large numbers, and not uncommon. A light flashed when it was realized that herding animals today, when fording a river, sometimes panic. The stampede occurs IN the river, and many drown. The distribution of animal bodies downstream appear to be the same as those dinosaur distributions. Thats one. Tar pits work quite well today. That's two. I've seen stuff deposited in marine sediments. That's three. There are about a dozen cars mostly buried about 9 miles from here where a parking lot caved in into the drainage ditch/river feeder caved in. I have little doubt that any small animals in the parking lot went with them. That's four. Sedimentation rates look like they are going like gangbusters to me. Look at the estuaries filling in. Look at the marine channels filling in. You don't get sedimentary build up on top of hills. ------------------------------------------------------------------------ Folded rocks show that it was done when they were soft He next stated that when you hit something that's hard, it breaks or shatters. These folds are smooth, so it must be that the rock (he showed and mentioned sandstone) was still forming from mud, and was still soft. This means that the layers formed very rapidly, to still be soft (down at the bottom layer) when the whole shebang got faulted. His (inevitable) conclusion: it all formed during Noah's flood. Rebuttal: nothing "hit" that rock. Conventional geology understands the strength and brittleness of these things: they can and have been measured in labs. Note, I'm not saying that rocks of a given type are identical. The point is that science has dealt with all this quantitatively. The rocks got folded by compression, not by sudden impact: and in fact some rocks do shatter. I've seen examples - for instance, hard black fragments embedded in a softer gray rock. The gray rock had flowed while the black shattered. Folding can happen in a lot less than geological time. If you go to the Roman dig at the Fort at Housesteads, in Northumbria, you can see the remains of Roman barracks which now lie in definite waves, because of the movement of the earth beneath them. The mortar between the stones is still intact. ------------------------------------------------------------------------ Oldest living things, bristlecone pines, are younger than 5000 years. Sure. In fact, if you go for grove instead of individual tree and match similar growth rings (similar events in overlapping lifespans) it goes well over 11,000 years. ------------------------------------------------------------------------ Man and dinosaurs coexisted. (Creationist Institute of California). Refuted. Institute discredited and licence (to grant science degrees) recently revoked. BTW: Those "footprints" in the Paluxy river bed are NOT human. A simple observation of the tracks reveal that while an arch is present forward of the heel, there are only three toes. If a track is observed which is uneroded, webbing is visible between the toes. A special on NOVA allowed these tracks to be visible to millions. Dr. Walter Brown, now director of the Center for Scientific Creation in Phoenix, AZ. Brown, may fall back on a rather novel technique that he has employed in the past -- denying having ever supported the idea. Brown first used this tactic not long after the Paluxy River tracks were shown conclusively to be either dinosaur tracks or erosion marks. When asked for his opinion, Brown claimed that he had NEVER supported the Paluxy River tracks. However, he was forced to 'fess up when shown the transcript of a local Ontario TV program, "Speaking Out," when he stated that Paluxy River was very good evidence for creationism. ------------------------------------------------------------------------ The suddenness with which major changes in pattern occurred and the virtual absence of any fossil remains from the period in which they were alleged to be evolving. This can be explained by punctuated evolution, in this regard it is important to note that not all suggested lineages in the fossil record have such abrupt changes and gaps. There are several fossil successions that record critical evolutionary steps and at a fine taxinomic resolution. The development of the modern horse is a fairly complete succession, as is the development of mammal skull characteristics from the therapsida of Permean time. Other examples of pretty gradual evolution? Instantaneous changes of taxa, on a geologic time scale, between long periods of stability does not pose insurmountable problems for neo-evolution since it is genetic equilibrium that allows long stable periods and stressing the gene pool into metastable states that allows for punctuated evolution. ------------------------------------------------------------------------ Many extinctions lack obvious reasons. The "obvious reasons" are obvious to him, and do not necessarily have anything to do with reality (i.e. 'cause he don't see it don't make it gone) This may be a problem for compiling a history of life, but the existence of extinctions at all poses problems for anyone claiming life has teleology. If a divine creator is calling the shots then finding extinctions casts doubt on the perfection of his plan, or even the existence of a plan. As for finding causes for extinctions, this is going to be an area of some debate for years to come. The ideas that have been advanced find some common collapse of habitat that is consistent with evolutionary biology. The suddenness, or seeming catastrophe of proposed events do not really threaten uniformitarianism because they are changes of rate, but not of process. The "Lack of Obvious Reasons", may overstate the problem, for a series of events such as asteroid impact, continental collisions, destruction of barriers between habitats, all have been advanced and all point to the destruction of habitat and with it mass extinctions. ------------------------------------------------------------------------ The doctrine of evolution is atheistic and therefore immoral. Unlike creationism, evolution doesn't require the acceptance or rejection of any religion. In fact, many theists believe in evolution. The doctrine that atheism is immoral is bigotry, and therefore immoral. Competition doesn't imply hatred or war. ------------------------------------------------------------------------ Competition for survival implies "strife, hatred, war, and death." The Soviets did have a problem along these lines. Lysenko in particular disbelieved in natural selection for these reasons. He got charge of the Soviet Union's grain production. Their agricultural industry has almost recovered... ------------------------------------------------------------------------ The great complexity of nature shows it was designed. Laws require a lawmaker; organization requires an organizer. No, it doesn't. The patterns within a kaleidoscope are very complex, and extremely organized (in the sense of symmetrical patterning) but are not designed. ------------------------------------------------------------------------ The Bible says so. In the resolution from the 67th General Convention of the Episcopal Church acted in September 1982 to "affirm its belief in the glorious ability of God to create in any manner," rejected "the rigid dogmatism of the 'Creationists' movement," and supported "scientists, educators, and theologians in the search for truth in this Creation that God has given and entrusted to us." Addressing the Pontifical Academy of Sciences before its meetings on Cosmology and Cosmogony in October 1981, Pope John Paul II reaffirmed the statement of Pope Pius XII that the universe was created "millions of years ago" directly contrary to creationists views. The Pope declared that "The Bible itself speaks to us of the origin of the universe and its make-up, not in order to provide us with a scientific treatise..." ------------------------------------------------------------------------ The Bible is accurate on other points, so it must be accurate on creation. Leviticus 11:113,19 and Deuteronomy 14:11-18 list fowl, and both have bats in the list with heron, lapwing, and bat closing off the list. The bat is not a bird. Leviticus 11:6 has a hare chewing its cud. Rabbits do no such thing. reminder for Barry: "cud" is not "shit". BTW: 'Gerah', the term which appears in the MT means (chewed) cud, and also perhaps grain, or berry (also a 20th of a sheckel, but I think that we can agree that that is irrelevant here). It does not mean dung, and there is a perfectly adequate Hebrew word for that, which could have been used. Furthermore, the phrase translated 'chew the cud' in the KJV is more exactly 'bring up the cud'. Rabbits do not bring up anything; they let it go all the way through, then eat it again. The description given in Leviticus is inaccurate, and that's that. Rabbits do eat their own dung; they do not bring anything up and chew on it. thanks to Robert Low Leviticus 11:21-23 lists things with four legs. Among the list are locust, beetle (cricket in some translations), and grasshopper. Psalms 58:8 says "as a snail melts..." Snails do not melt. Gen 1:20-21 has the waters bringing forth Gen 2:19 has them coming from the ground. Maybe some one should tell them about eggs? Genesis 30:39 cattle looking at pilled rods conceive and bring forth ringspeckled, speckeled and spotted calves. changing the characteristics of a descendant by showing them a rod just doesn't work... Matthew 4:8 ..took upon a high mountain and shewed all the kingdoms of the world. 1. Geology - rock simply isn't strong enough for such a megamountain. 2. astronomical bodies are spherical, and you cannot see the entire exterior surface from anyplace. Genesis 3:14 "...and dust though shalt eat all the days of thy life." Snakes, while built low, do not eat dirt. ------------------------------------------------------------------------ (Referring to a genesis "day") It ALWAYS (Morris's stress) refers to a twenty-four-hour day. So much for the apologists... ------------------------------------------------------------------------ Later Biblical characters (Moses & Paul) refer to the fact of creation, not the myth. Are we to take people that we have no independent record of as authoritative references in the only document they ARE mentioned in? This is like Santa Claus in The Night Before Christmas testifying as to the veracity of the "visions of sugarplums". ------------------------------------------------------------------------ Even Jesus Christ believed in the Genesis record of creation. Ibid, though this is clearly an attempt at pleading from authority. ------------------------------------------------------------------------ It is thus absolutely impossible to believe in the Bible as the complete and literal Word of God and to believe in the theory of evolution. But, more than that, it is almost impossible to believe in a personal God of any sort if one believes in evolution. The Pope doesn't agree with this statement. Nor do many other leading religious figures. They will be glad that this civil engineer pointed it out for them... ------------------------------------------------------------------------ The atheistic and satanic character of the doctrine is evidenced in the many evil social doctrines it has spawned. What?!?! Talk about irrelevant mud-slinging!!! ------------------------------------------------------------------------ Fall of man: Records say civilization was man's original condition. Which records are these? The Old testament? And of course. Without the civilization you don't have the records. So "as far back as they go" is civilization. When there isn't civilization, the records quit going. This one is very interesting, it reveals the core prejudice of christian, and other, origins, that man is fallen from some primordial grace. The evolutionary evaluations of origins avoids the opposite prejudice as well, that evolution is always progressive. It says that the idea of progress in the condition of a lineage is misleading; change is reflected in adaptation and specialization which may be by turns successful or lethal. ------------------------------------------------------------------------ Place of man's origin: Evidence confirms origin in one locality. Observing population distributions takes divine inspiration? One successful group spread and killed off the less successful ones. Supports evolution, too. OK Bible scholars, where does Moses say man came from? The claim here of proof of God's inspiration is wrong, even if Moses got it right. Man came from Africa, despite years of searching for human ancestors in Europe and Asia. Evidence says Man came from Africa, despite years of searching for human ancestors in Europe and Asia. ------------------------------------------------------------------------ Order of events in creation matches what an observer would have seen: 1: Beginning, 2: an earth in darkness, 3: light, 4: atmosphere, 5: dry land, 6: plants, 7: discernable sun, moon, stars, 8: sea and air creatures, 9: beasts, 10: man. The actual order should be more like 1: beginning, 2: light, 3: sun, stars, 4: atmosphere, 5: earth, 6: dry land, 7: sea creatures, 8: moon, 9: beasts (amphibians and reptiles), 10: fruiting plants (which is what Genesis specifies), 11: air creatures, more beasts, 12: man. I'm not sure the order is exact (the moon may have come earlier, for example), but it is more accurate than the Genesis version. ------------------------------------------------------------------------ Earth is unsupported (Job 26:7) Job 38:4 says Earth has a foundation. Job 26:11 says heaven is supported by pillars. ------------------------------------------------------------------------ Earth is round (Isaiah 40:22) Matthew 4:8 ..took upon a high mountain and shewed all the kingdoms of the earth. Not on a round surface he didn't... ------------------------------------------------------------------------ Water cycle is described (Eccl. 1:7) Job 38:22 says that snow and hail are kept in storehouses. ------------------------------------------------------------------------ Good sanitation practices are given (Deut 23:13, Num. 19:11-22, etc.) People aren't stupid. They could have figured these out without divine aid. ------------------------------------------------------------------------ History is accurate. Not unsurprising. It was written while the history was current events. ------------------------------------------------------------------------ The authors admit their human failings (Deut 32:50, Acts 19:20, etc.) This is true of lots of writings, even some USENET articles. Besides, does it make sense to claim that a book is infallible because its authors admit that they are fallible? ------------------------------------------------------------------------ The Bible is harmonious throughout. Given the amount of editing it went through, you would expect it to be reasonably harmonious, but it still contains contradictions. For example, Matt. 27:5-8 vs. Acts 11:18-19 and Matt. 1:16 vs. Luke 3:23. ------------------------------------------------------------------------ Numerous prophecies fulfilled. Prophecies weren't meant to predict the future. The word originally meant "divinely inspired speech." Not until 1300 did it come to mean "predicting future events." [Oxford English Dictionary] Besides, there are lots of mundane ways to predict the future: 1. Make the wording sufficiently vague that, with proper interpretation, it could apply to practically anything. 2. Predict something which has already happened. 3. Rewrite history to say that your prediction was actually fulfilled. 4. Give no time limit for the prediction. 5. Predict something which is extremely likely to occur. 6. Make so many predictions one of them is bound to occur. Later, edit out those that failed. 7. Predict something that you yourself can cause to happen. All of the predictions below can be fit into one or more of these categories. ------------------------------------------------------------------------ Religion's views on creationism: In the resolution from the 67th General Convention of the Episcopal Church acted in September 1982 to "affirm its belief in the glorious ability of God to create in any manner," rejected "the rigid dogmatism of the 'Creationists' movement," and supported "scientists, educators, and theologians in the search for truth in this Creation that God has given and entrusted to us." Addressing the Pontifical Academy of Sciences before its meetings on Cosmology and Cosmogony in October 1981, Pope John Paul II reaffirmed the statement of Pope Pius XII that the universe was created "millions of years ago" (in european millions is american billions. directly contrary to creationists views. The Pope declared that "The Bible itself speaks to us of the origin of the