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The message is that evolution, in one way or another, must be the answer. In this sense, evolution can be anythinganything, that is, except divine creation. This is why evolution is not tied to natural selection or any other specific mechanism. It is simply anything but creation. It is any naturalistic explanation for the origin of species. This is why evolutionists speak of fact and theory. It is a theory in the sense that we dont know how it occurred; it is a fact because nonnaturalistic explanations (i.e., divine creation) have been ruled out. | |||||||||||||||
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September marks the third year Creation-Evolution Headlines has been bringing you near-daily reports on the important issues related to origins. This website is a growing database of science news (mostly from secular journals), all classified by topic, with color commentary. Now 1500+ entries! Are you a regular reader? Drop us a line and let us know youre out there. While youre at it, tell us what you like or dislike, what topics most interest you, and any suggestions for improving this service. Heres where to write. (Note: you will not be put on a mailing list; we just like hearing from our readers.) Movie Suggestion 09/30/2003 If you havent seen the new movie Luther starring Joseph Fiennes and Peter Ustinov, it might provide some worthwhile visual context for our 08/19/2003 commentary on the Darwinian Counter-Reformation. Next headline on: Movies.
Editorial 09/30/2003
Dog Genome Shows Human Similarities 09/29/2003 They have just a rough sketch of the canine genome at this point. They havent identified the gene that makes a dog drink out of the toilet or eat its own barf. Compared to its strong, handsome wolf-like ancestor, the poodle is a genetic disaster. What would they expect?Why Does Uranus Have So Many Small Moons? 09/29/2003 Are they chips off old blocks, or what? Several newly-discovered moons around Uranus are puzzling astronomers, reports Astrobiology Magazine. Jack Lissauer explains: The inner swarm of 13 satellites is unlike any other system of planetary moons. The larger moons must be gravitationally perturbing the smaller moons. The region is so crowded that these moons could be gravitationally unstable. So, we are trying to understand how the moons can coexist with each other. He thinks the San Francisco sized rocks are fragments left when a comet hit the moon Belinda, because it is unlikely they would have formed 4 billion years ago and still be around today. This is not the only system with small moons. Every giant planet has a swarm of rocks. Gravitational influences on these small bodies should eject them over time. Planetary scientists admit its puzzling that so many should exist today (see May 14 headline).SETI: Scientific Progress Goes BOINC 09/29/2003 The popular SETI@home program is undergoing an overhaul, reports The Planetary Society. With apologies to Calvin and Hobbes, its going BOINC. The new BOINC software architecture (Berkeley Open Infrastructure for Network Computing) will not only provide more flexibility, but can be adapted for other scientific projects that might benefit by massively distributed computing. Dont give this to the spammers and hackers. Thats all we need is more DDOS (distributed denial of service) attacks on the net. 'Net users suffering under daily loads of Nigeria scams, porn sites and deceptive ads, to say nothing of worms and viruses generated for no other purpose than to cause anonymous pain, are getting an education on the reality of human wickedness. Should SETI researchers assume the aliens are innocent, compassionate friends?Biological Networks: Does Group Dynamics Trump Natural Selection? 09/29/2003 There seems to be a move among biologists to diminish the role of natural selection in biological evolution. A press release from Arizona State University, for instance, attributes the complexity of insect societies to network dynamics. The complexity is an emergent property of social interactions, not natural selection acting on the genes. This is Jennifer Fewells contention in a paper on insect social order published in the Sept 26 issue of Science1, part of a special section on Networks in Biology2 (see also next headline). Other papers in the series discuss protein networks, nerve networks, and metabolic networks within this apparently new paradigm of self-organization that emerges apart from natural selection acting on genetic mutations. In the introductory paper, Life and the Art of Networks,2, Jasny and Ray explain that biologists are moving beyond compiling a parts list and trying to understand the larger picture of how components interact in complex processes. They ask, One assumes that biological regulatory networks are the result of crafting [sic] by natural selection. But are they? 1Jennifer H. Fewell, Social Insect Networks, Science doi 10.1126/science.1088945, 301:5641 (26 Sep 2003), pp. 1864-1870. 2Barbara R. Jasny and L. Bryan Ray, Life and the Art of Networks, Science 301:5641 (26 Sep 2003), p. 1863. Lets try to get this reasoning straight. They use analogies such as the Internet, electronic circuits and electric power grids as networks. So studying the Internet (built by intelligent design), circuitry (built by intelligent design) and the electric power grid (built by intelligent design, more or less) can help us understand how ant colonies, brains, metabolic pathways, cell cycle regulation, gene expression, protein complexes and human behavior all emerged by time and chance.Darwins God Is a Tinkering Master Engineer 09/26/2003 Moses, Elijah and Ezra would be shocked. Idolatry has again invaded the land of Israel. U. Alon, a molecular cell biologist at the Weizmann Institute of Science, Rehovot, Israel, has written a Viewpoint piece for Science Magazines 09/26/2003 special on Biological Networks, entitled The Tinkerer as an Engineer.1 Dr. Alon has no need of the God of Abraham, Isaac, and Jacob, the omniscient, omnipotent, all-wise Creator of all. To him, evolution achieves masterful design just by cobbling parts: Francois Jacob pictured evolution as a tinkerer, not an engineer [Science 196:1161 (1977)]. Engineers and tinkerers arrive at their solutions by very different routes. Rather than planning structures in advance and drawing up blueprints (as an engineer would), evolution as a tinkerer works with odds and ends, assembling interactions until they are good enough to work. It is therefore wondrous that the solutions found by evolution have much in common with good engineering design. This Viewpoint comments on recent advances in understanding biological networks using concepts from engineering.Biological networks exhibit good engineering design, he explains, by their modularity, robustness to component tolerances, and the use of recurring circuit elements. He describes molecular biology as reverse-engineering on a grand scale. In conclusion, Alon says, The similarity between the creations of tinkerer and engineer also raises a fundamental scientific challenge: understanding the laws of nature that unite evolved and designed systems. (Emphasis added in all quotes.) 1U. Alon, Biological Networks: The Tinkerer as an Engineer, Science 301:5641 09/26/2003, pp. 1866-1867. This has to be one of the worst examples of evolutionary idolatry in recent months. Many evolutionists have used the tinkerer concept to personify evolution, but Alon takes the cake. And in the land of Israel, no less. Could Baal worship have been any worse? Stop playing word games with us, Darwinists: either make little idols of Mother Nature and sell them, or quit the illogical, misleading, nonsensical, blasphemous verbiage. It makes you sound like you are already stoned.Own Your Own Jurassic Park 09/26/2003 The BBC News reports that, beginning in 2005, you may be able to plant your own Wollemi Pine at home. Discovered alive in an isolated Australian grove in 1994, Wollemi pines were thought to have gone extinct after the Jurassic era. According to a botanist involved in the discovery, it was the equivalent of finding a small dinosaur still alive on earth. The trees grow slowly in low light, in hot or cold climates, and would make perfect indoor plants. Plant it next to your Dawn Redwood and Ginkgo trees, similar living fossils. Why no evolution in 100 million years? Who needs the millions of years? Imagine the fossil ones living just a few thousand years ago, and it all begins to make more sense.Why Would Seals Become Foster Parents? 09/25/2003 Neil J. Gemmell (U. of Canterbury, Christchurch, NZ) is scratching his head over why a fur seal mom would nurse anothers pup. This seems very unDarwinian: Why fostering occurs in pinnipeds is currently unknown. Fostering is a costly behaviour on a variety of fronts. Production of milk is physiologically demanding and may affect female survival and future reproductive success. In addition, the quantity and quality of milk has a strong impact on the survival prospects and growth of juveniles (Roulin 2002). It is expected, therefore, that nursing activities directed towards unrelated offspring should be selected against strongly as these would act to increase the fitness of competing progeny in a population, at the expense of the mothers own offspring.(Emphasis added in all quotes.) So Neil studied Antarctic fur seals on Bird Island, South Georgia, for clues to this altruistic behavior and published a study in the Royal Society Biology Proceedings1. The seals he studied are better at detecting their own kin than other species, whose fostering might be explained by milk stealing or other trickery on the part of the pups. He measured about a 11% fostering rate looking at genetic markers (which were somewhat ambiguous for close relatives). What might be the reason for fostering? Maybe the pups have gotten sneaky while waiting for mom to get back from foraging. Gemmell thinks, however, based on the apparent kinship between foster moms and pups, that the data suggest a possible role for kin selection; i.e., that there may be inclusive fitness advantages to individuals that foster the pups of close kin (Hamilton 1964), which arises out of the need for otariid mothers to leave their pups for extended periods of time. More study will be required, though, to measure what the actual energetic costs of fostering are, the frequency of fostering, whether filial pups get better treatment, etc.: It would also be desirable to establish what influence food availability, female condition, female age and pup loss have on the fostering behaviours observed. Comparison studies with other species of fostering seals might help, too. Neil J. Gemmell, Kin selection may influence fostering behaviour in Antarctic fur seals (Arctocephalus gazella), Proceedings: Biological Sciences, The Royal Society, 270:1528 (pp. 2033-2037), 10.1098/rspb.2003.2467, Oct. 2003. Too bad W. D. Hamiltons 1964 tall tale, kin selection, is dead (see 05/07/2002 headline), or this might have provided some characters for the plot. Notice how all evolutionists seem to be able to do is suggest that some variation on their tale might provide an explanation for whatever is being investigated. Notice also how more study is always required.Meteor That Killed the Dinosaurs Didnt 09/25/2003 According to Gerta Keller (Princeton), the meteor that formed the Chicxulub Crater in the Yucatan was not responsible for wiping out the dinosaurs. It was smaller than previously believed, and came 300,000 years too early. According to her research, that impact does not coincide with the K-T boundary, and it was too small to kill even small organisms like foraminifera. She thinks worldwide volcanism and a series of impacts did the job. These views have not made Keller a popular figure at meteorite impact meetings, says EurekAlert. But the idea that a single impact caused a worldwide mass extinction 65 million years ago has been taking a beating by more and more very renowned scientists, the article claims. More detail can be found at the Princeton Weekly Bulletin. This makes the final episode of Walking With Dinosaurs obsolete. Wonder what the BBC animators think? It was a fun story, while it lasted.Radiocarbon Found in Ancient Coal 09/25/2003 Dr. John Baumgardner reported finding carbon-14 still ticking in coal samples that should be radiocarbon-dead. Because carbon-14 has a short half life of 5730 years, it rapidly decays, such that after 20 half-lives (114,700 years) carbon-12 would outnumber carbon-14 atoms a million to one. After 1.5 million years, if one had started with a pile of carbon-14 equal to the mass of the entire universe, not a single carbon-14 atom would be left. Therefore, carbon-14 should be totally absent in samples far younger than a million years old. Baumgardner and a team from the Institute for Creation Research involved in studying radiometric dating methods submitted 10 samples of coal from three different geological periods (Eocene, Cretaceous and Pennsylvanian) to a leading radiocarbon dating laboratory, which uses the highly accurate accelerator mass spectrometer (AMS) method. The samples measured 0.21 to 0.27 percent modern carbon (pmc), indicating they cannot be older than 50,000 years, and possibly much younger, even though according to the geologic column, the periods tested are assumed to range around 50 million, 100 million and 300 million years old, respectively. The measured values fall squarely within the range already established in the peer-reviewed radiocarbon literature, says Baumgardner, and show little difference in 14C level as a function of position in the geological record. Source: ICR Impact #364, October 2003. Critics will undoubtedly complain that these creationists have an ulterior motive for questioning the old age of the earth, but doesnt that criticism cut both ways? Are the motives of Darwinians pure as the wind-driven snow? Can we not brush aside the motive-bashing and just look at the facts? Its the quality of the research that matters.Teeny Changes in Bees, Fruit Flies: Is This Evolution? 09/23/2003 Researchers at UC San Diego went to Brazil to study the bees (and maybe some birds, on the side). They wanted to see how bees had evolved the ability to communicate the location of food sources. Honeybees have an elaborate dance they do in the hive that communicates how far away the food source is, what direction it is in relation to the angle of the sun, and how good it is. Some other species leave an odor trail at intervals between the food source and the hive. The scientists found what they feel is an intermediate strategy, in which bees leave an odor trail extending a short distance from the food source. This abbreviated trail may be less conspicuous to foraging competitors, they say. Their work is being published in an upcoming issue of the Royal Society Biology Proceedings. At Cornell, biologists studied apple maggots, which doesnt sound too appealing, but you do what you have to for science. They compared them with another species that is attracted to hawthorn, and the two types do not interbreed. By extracting the fruit odors and seeing how the flies reacted, they deduced that there is a slight genetic difference that keeps them separate populations, even though they look exactly alike. They feel this is an example of sympatric speciation, in which a species splits into two within the same geographic location. Surprisingly, this split occurred within 150 years, after apple trees were introduced into North America. Apparently some of the hawthorn flies took a liking to the new food source. The work is published in the Sept 22 online preprints of the Proceedings of the National Academy of Sciences1 1Linn et al., Fruit odor discrimination and sympatric host race formation in Rhagoletis, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.1635049100, published online 09/22/2003. Microevolution, microevolution, all they ever show us is microevolution. The fly paper admits that there is no morphological difference between the two varieties. Theres more morphological difference between a poodle and a beagle, yet both are Canis familiaris, one species. Big deal. The bee keepers did not find anything remotely similar to the complex waggle dance honeybees do. They just found a very minor variation on the odor-trail strategy. Big deal.Neanderthals Interbred with Modern Humans, Ate Same Food 09/23/2003 A jawbone found in a Romanian cave and published in PNAS1 has features that show some degree of hybridisation they are possibly the result of interbreeding between modern humans and Neanderthals, reports BBC News. This is a position that drives a heated debate among scientists, many of whom doubt there was much mixing of the species, the article says. The original paper says it presents a mosaic of archaic, early modern human and possibly Neandertal morphological features, emphasizing both the complex population dynamics of modern human dispersal into Europe and the subsequent morphological evolution of European early modern humans. Another report from Univ. of Washington, reported by EurekAlert, claims Neanderthals and modern humans ate the same food. Cave scraps indicate they hunted the same prey and had to worry about the same cave bears. 1Trinkaus et al., An early modern human from the Pestera cu Oase, Romania, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.2035108100, published online 09/22/2003. Evolutionists want to keep Neanderthals separate from modern humans, because it makes their storytelling plot more interesting: you can have the two breeds fighting each other, or competing for resources in the struggle for existence. Suppose they found human bones in France similar to Andre the Giant, and in Italy similar to Tom Thumb. Can you imagine the fun their storytelling contest would have with these? Yet both would be Homo sapiens sapiens, fully human, fully modern. This latest find has nothing to do with human evolution, but it has a lot to do with the evolution of Darwinian storytelling.Research Teaser 09/22/2003 Item: David Horowitz this month released results of a survey of American college faculty, showing that Democrats outnumber Republicans 10 to 1 on average, and in some cases 30 to one or more. On some campuses, not a single Republican faculty member could be identified. Source: Students for Academic Freedom. Here is a research project for someone. What is the political leaning among science faculty? Horowitz survey focused primarily on the political and social science departments. It would be interesting to tally the political party affiliations (Democrat/Republican/other) or ideology (liberal/conservative) of evolutionists in the science departments.Foraminifera Exploded onto the Fossil Record 09/22/2003 An international team looked for the family tree of foraminifera (small shell-bearing animals) in the fossil record and genetics. This is a lineage that has been poorly understood, and from the results, it seems like it still may be poorly understood. From their abstract in PNAS1 (emphasis added): By using molecular data from a wide range of extant naked [shell-less] and testate [shelled] unilocular [single-chamber] species, we demonstrate that a large radiation of nonfossilized unilocular Foraminifera preceded the diversification of multilocular [multi-chambered] lineages during the Carboniferous. Within this radiation, similar test [shell] morphologies and wall types developed several times independently. Our findings indicate that the early Foraminifera were an important component of Neoproterozoic protistan community, whose ecological complexity was probably much higher than has been generally accepted.Prior to this, evolutionists had assumed there was a sequence of shell styles, one evolving into the other. According to their new phylogenetic analysis based on molecular comparisons, that view does not seem supportable: Morphological variations in some lineages by far exceed the traditional morphology-based taxonomy. For example, the Antarctic notodendrodids comprise several morphotypes, including spherical, tubular, and arborescent forms, some of them present together in a single species. This evolutionary plasticity among early Foraminifera makes their present morphology-based classification of limited value. We conclude that the thecate or agglutinated walls in unilocular Foraminifera are convergent features [sic], and that the simple evolutionary progression from one to the other, as envisaged by earlier authors, did not occur.They infer from molecular-clock phylogeny that there must have been a very rapid tempo of morphological evolution in the Precambrian of the naked, unilocular types, some of them arriving with similar shell types by convergent or parallel evolution, and then another very rapid diversification of the multilocular types in the Cambrian. They speculate that perhaps early eukaryotic predators drove the evolution of all this diversity, forcing prey organisms to adopt various avoidance or resistance modalities. Maybe the compartmentalization brought about by early Cambrian multi-chambered Cambrian models allowed them to exploit new possibilities, like symbiosis. At least this model is an important first step in understanding the complex ecology of the Neoproterozoic. 1Pawlowski, Bowser et al., The evolution of early Foraminifera, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.2035132100, published online 9/22/2003. Once again, no clear pattern of evolution, just hand-waving and JSS (just-so storytelling). Evolution is supposed to be so slow and gradual, but here is a story morphological radiation running prestissimo: i.e., multiple miracles at a rapid tempo occurring independently and simultaneously with no clear ancestral tree between forms. Its the lawn or forest picture again, instead of the single tree. If the rapid evolution were true, why dont we see it happening in the present? They use personal verbs like exploit to make it seem like these little critters are consciously planning and designing new things they can do with accidental inventions.More Trouble for Solar System Planetesimal Theory 09/22/2003 Lately, planetary scientists have been abandoning the old core-accretion theory for the newer disk-instability theory for the origin of the solar system (see June 3 headline). A paper in the September Icarus1 by Ishitsu and Sekiya, however, shows that instabilities will not form unless the dust/gas surface density ratio is hundreds of times as large as that for the solar abundance. The authors calculations took into account both the Coriolis forces and tidal forces, and showed that tidal forces have a stabilizing effect. The hydrodynamic and gravitationally instabilities tend to balance each other, so that The formation of planetesimals through the gravitational instabilities is difficult to occur as long as the dust/gas surface density ratio is equal to that for solar abundance. One hope for increasing local surface densities had been to consider radial migration of particles in the solar nebula due to gas drag. But in an early release of a paper for the October issue of Icarus2, S. J. Weidenschilling says only individual particles were considered. By considering the collective effects of gas drag on an ensemble of particles, he demonstrates that it can produce outcomes that are quite different from those inferred from motions of individual particles. Thus, Collective motion due to turbulent stress on the particle layer acts to inhibit such enhancement and may prevent gravitational instability. 1Naoki Ishitsu and Minoru Sekiya, The effects of the tidal force on shear instabilities in the dust layer of the solar nebula, Icarus Volume 165, Issue 1, September 2003, Pages 181-194, doi:10.1016/S0019-1035(03)00151-9 2S. J. Weidenshilling, Radial drift of particles in the solar nebula: implications for planetesimal formation, Icarus Volume 165, Issue 2, October 2003, Pages 438-442, doi:10.1016/S0019-1035(03)00169-6. Results of modeling like this are always dependent on assumptions and starting conditions; for instance, Ishitsu and Sekiya neglect the self-gravity of the dust layer, which is probably reasonable if the mass is low and distributed. Undoubtedly other papers will find a way around these problems. It goes to show, however, that initial hopes can be dashed by new considerations.Galileo Sacrifices Self for Europans 09/21/2003 Just one minute ago at the time of this writing, the venerable Galileo Spacecraft plunged into Jupiter to begin its fiery meltdown. Team members, their families, and the news media, packing the auditorium to overflowing, gathered at JPL to witness the event. The audience watched the countdown and broke into applause at the calculated time of impact, even though the signal would take another hour to reach waiting antennas on the earth. This event ended a 13-year mission that revealed numerous surprising and unexpected findings about the miniature solar system of Jupiter and its moons. Some of these surprises included the high temperature lavas on Io, evidence of recent resurfacing on Europa and a possible subsurface ocean, a magnetic field at Ganymede, erosion on Callisto and a paucity of small craters and lack of a differentiated interior (unlike its twin Ganymede), and unexpected low density of the moon Amalthea. Mission scientists during the news briefings today used the word surprised numerous times when recounting the discoveries1. In addition, Galileo attained high-resolution data about Jupiters magnetic field, atmospheric storms (including lightning orders of magnitude brighter than on earth), the fine-dust ring system, and surfaces of the four major moons. In 1994, it provided a remote observing station for the rare impact of comet fragments in Jupiters atmosphere. Despite its crippled main antenna, Galileo also took historic pictures of two asteroids (Gaspra and Ida), and the Earth-Moon system. It even tried to detect the presence of intelligent life on Earth during its 1990 swingby. Results were inconclusive. Last February, Galileos engines were fired to send it on a trajectory to impact Jupiter, fulfilled today. Its vaporized fragments now reunite with molecules of the atmospheric probe sent into Jupiters cloud tops in December, 1995. Most likely the remains of both only descended only a few percent the radius of this huge planet. Though the actual ship has now sunk, a full-scale model of the Galileo spacecraft remains on display in the JPL Museum. Most important, the data is safe on earth. It will be at least a decade before another flight to Jupiter. If funded and approved by Congress, the next ambitious mission might be the nuclear-powered JIMO (Jupiter Icy Moons Orbiter). A large part of the justification for ending the mission in this fiery finale was to protect Europa. With Galileo low on fuel and out of reach of navigator control, there was a slight chance it might accidentally hit the icy moon within the next few hundred years. Whether inspired by Arthur C. Clarkes 2010 (attempt no landings there) or not, NASA considers Europa a prime target in the search for life. Apparently less concerned about Jupiter itself, despite Carl Sagans speculations in Cosmos that floating life-forms might have evolved there, NASA did not want to risk contaminating the surface of Europa with any microorganisms that might still have inhabited the aging spacecraft. Its probably a wise move, in this eventuality: if Galileo germs were found on Europa some future day, how would scientists be sure of the source? Evolutionists might argue for years that they evolved in situ and use it as propaganda for chemical evolution. Better to keep Europa pristine till a new mission can end all speculation.Your Motors Perform Cooperative Interactions 09/18/2003 The motor that powers all life, often called a splendid molecular machine, looks even more splendid due to research by Caltech and French scientists. It has parts that help each other out. ATP synthase, which we have reported on frequently before (see 11/15/2002 headline), is a true rotary motor, and probably the most abundant enzyme on earth. Its job is to generate ATP, the energy currency of life. Because of the importance of this enzyme, the search for a full understanding of its mechanism is a key problem in structural biology, they state in their PNAS paper.1 They found that the structure of the six-lobed F1 upper unit, where ATP is catalyzed from ADP and phosphate, actually is tuned to enhance the productivity of the system. Most living things have the F0-F1-ATPase model, composed of an upper and lower mechanism joined by a camshaft and some other parts, although there are variations in some bacteria. The six lobes of the F1 motor, arranged in pairs like orange slices around the camshaft, form three catalytic sites where ATP is synthesized. The researchers did thermodynamic and kinetic modeling of these structures and found that the shapes of the sites change as the camshaft rotates in a way that enhances productivity. Each pair of lobes cycles through three stages as the shaft turns: (1) insertion of ADP + P, (2) catalysis of ATP, and (3) ejection of the product. Each stage is not only finely tuned for its job, but actually stimulates the adjoining pair of lobes to do its job better: e.g., at stage one, the shape of the lobes causes the reaction in stage two of the adjoining lobes to accelerate. The reaction in stage two speeds up the ejection of product in stage three, and so on. Overall, this enhances the productivity of the system by a factor of 300 or more than would occur if a pair of lobes had to work alone. This and the rotation of the camshaft enhances productivity by a factor of 500,000. They mention some other interesting facts about ATP synthase in passing. Each motor (and your body has quadrillions of them) can hydrolyze from 40 to 600 ATP per second. With three ATP per revolution, that translates to 12,000 RPM at top speed. Without these enzymes, it would take 500,000,000 times as long for ATP to hydrolyze in solution. Though they studied primarily the hydrolysis cycle, the synthesis reaction, driven by an electric current (proton flow) in the lower F0 subunit, is similarly accelerated because of the efficient mechanical arrangement of the parts. 1Gao, Yang, Marcus and Karplus, A model for the cooperative free energy transduction and kinetics of ATP hydrolysis by F1-ATPase, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.1334188100, published online 09/18/2003. This is one of our favorite cell toys, because it is so exquisite, so small, so efficient, and so essential to all life, even the simplest single-celled organisms. As each new fact comes to light, it looks even more wondrous. Your car roars at 4,000 RPM; imagine these little motors, embedded in the mitochondrial membranes of all the cells in your body, humming along at up to 12,000 RPM. The efficiency of these motors nears 100%, because they are able to harness the random bumps of Brownian motion into ratchet-like boosts, so that no energy is wasted generating power for your bodys needs (see Feb. 5 headline about your bodys electrical power plant). Each day your body recycles at least half your body weight in ATP through these splendid molecular machines.Dark Matter Missing from Elliptical Galaxies 09/18/2003 An international team of scientists publishing in Science1 this week reported a surprise from their observations of three ordinary elliptical galaxies: there is no dark matter. Its not supposed to be visible, of course, but they found that dark matter is not required in dynamical models of these galaxies to account for their observed motions. This unexpected result conflicts with findings in other galaxy types and poses a challenge to current galaxy formation theories, they say. The velocity dispersions in these galaxies follows a normal Keplerian decline from center to edge, suggesting that these systems are not embedded in massive dark halos. Although a number of assumptions must be made, models devoid of dark matter produce the most plausible results. This result clashes with conventional conceptions of galaxy formation, they announce. In particular, if ellipticals are built up by mergers of smaller galaxies, it is puzzling that the resulting systems show little trace of their precursors dark matter halos. Did the dark matter get stripped out somehow? They dont think so. It is apparent that some important physics is still missing from the recipes for galaxy formation. 1Romanowsky, Freeman et al., A Dearth of Dark Matter in Ordinary Elliptical Galaxies, Science 301:5640, 1696-1698, 09/19/2003. Lets call dark matter what it really is: fudge. The only ones who need fudge in their diet (see the June 20 headline about the Science bake sale) are the cosmologists who arent satisfied with the meat and potatoes of hard data, but want a dessert of naturalistic explanations for everything. Like mother warned, too much fudge ruins your appetite for a healthy diet.Big, Big Guinea Pig 09/18/2003 You wouldnt have wanted to keep this pet at home; an extinct rodent as big as a buffalo has been reported in Science1. Similar to a guinea pig but much larger, Phoberomys pattersoni was 9 feel long and 4.2 feet tall. Even though EurekAlert dubs it Guinea-zilla, it probably ate grass. 1>Marcelo R. Sanchez-Villagra, Orangel Aguilera, and Inis Horovitz, The Anatomy of the World's Largest Extinct Rodent, Science, 10.1126/science.1089332 (19 Sept 2003). The reports on this fossil are filled with speculative Darwinspeak. But whats evolution got to do with it? A big rodent once lived, and it went extinct. You would think we are on the verge of vindicating Darwin from all the hype. Listen to the AAAS spin release on EurekAlert (emphasis added):Trilobite Had Visors 09/18/2003 UK scientists have found a trilobite from Morocco with sun visors. The odd eyeballs of this extinct creature extend upward in two columns from the head, and contain vertically-stacked lenses (about 560 in all) that provided a commanding field of view that was entirely over the sediment surface on which the animal lived. The compass of the eyes shows that they commanded a 360-degree sweep in the horizontal plane. The high elevation of the eyes meant that the animal could even see backward over its thorax. Above each column of lenses, a lobe extended to provide shade from stray light from above. The authors of the report in Science1 comment that trilobites already had unusually sophisticated eyes with lenses made out of the mineral calcite, and many trilobites had binocular vision and internal structures of high magnesium calcite that helped the lenses to focus more precisely by eliminating sources of fuzziness, such as spherical aberration. The authors feel this indicates these trilobites were diurnal, rather than nocturnal; An eyeshade is of little use in the dark, they say. 1Richard Fortey and Brian Chatterton, A Devonian Trilobite with an Eyeshade, Science (19 Sept 2003), 10.1126/science.1088713. My, werent these critters smart to figure out all the nifty optics and cool sun visors. The article is strangely silent about any transitional forms that might have led up to these high-tech innovations. The pictures of this weird animal are stunning, if you have access. The preservation of fine details in such an old fossil is remarkable.Greenhouse Gas in the Distant Past 09/18/2003 One of the geologists who proposed the Snowball Earth hypothesis believes he has found evidence that carbon dioxide levels in Earths atmosphere were 10-200 times higher 1.4 billion years ago. Jay Kaufman (U. of Maryland) and a colleague studied carbon isotopes in a single-celled plant fossil to arrive at the numbers, explains a National Science Foundation press release. Kaufmans paper is published in todays Nature1 1Alan J. Kaufman and Shuhai Xiao, High CO2 levels in the Proterozoic atmosphere estimated from analyses of individual microfossils, Nature 425,279-282 (18 Sep 2003); doi:10.1038/nature01902 Whenever a claim is made about how things were billions of years ago, be a good baloney detector and hunt for what was measured. Brush off the interpretation and the dates, which are based on evolutionary assumptions, and find that one little thing that was actually subjected to experimental lab methods. Here it is from the NSF press release (emphasis added):Plasma Blob: Its Alive? 09/17/2003One of the ocean-dwelling organisms producing oxygen during the later Proterozoic period [ignore the interpretation here] was Dictyosphaera delicata, a microscopic plant not much bigger than the dot in the letter i. To estimate the ancient levels of atmospheric CO2, Kaufman and Xiao measured ratios of two different forms, or isotopes, of carbon present in individual microfossils of this plant.Now decide whether carbon ratios in tiny specks of material subjected to hydrofluoric acid and high-energy beams and contamination by camel hair, can tell anyone anything about the state of the whole world over a billion years ago. Their resulting CO2 calculation depended also on models, averaging values, throwing out anomalous readings, and making assumptions about how these plants metabolized with carbon dioxide. They admit the sensitivity of their measurements depends critically on surface temperature and volume-to-surface ratio. How convenient for evolutionists there are no time machines for them to go back and make in situ observations from points all over the globe. Yet on the basis of tiny specks of questionable data, Kaufman states authoritatively, like an eyewitness, New Scientist claims, Plasma blobs hint at new form of life. In an experiment worthy of Frankenstein, a Romanian scientist inserted two high-voltage electrodes into a plasma of argon, and created cell-like spheres of plasma that could replicate by splitting in two and communicate information by emitting electromagnetic energy, making atoms in other spheres vibrate. Mircea Sanduloviciu and team (Cusa University, Romania) claim this shows that cell-like self-organization can occur in a few microseconds instead of millions of years. Sanduloviciu speculates these could have been the first cells on earth, formed in electrical storms. The emergence of such spheres seems likely to be a prerequisite for biochemical evolution, he said. Others think that is a stretch, but are intrigued by the implications that life might take on forms much different than the DNA and protein-based life we know on earth. Were not going to dignify this claim with a serious analysis, other than to wonder why New Scientist would give it the time of day. But we will contribute our own theory: the Lava Lamp theory for the origin of life. Lava lamps are not just a kitsch conversation piece for nerds; they are an emerging life-form. Notice how the blobs replicate and communicate, exchange energy, and rise and fall in non-repetitive ways. Clearly there is more self-organization going on than meets the casual eye. If volcanoes under the sea created similar conditions, then perhaps the first life-form evolved from such a phenomenon. Hook up your Lava Lamp to a Jacobs Ladder, and talk to it. You might find yourself shrieking, Its allll-iiii-vvvv-eeee! (Wonder if Sanduloviciu is from Transylvania?)How Fairness Evolved 09/17/2003 If researchers at Emory University are right, our sense of justice and fairness evolved from monkeys. Nature Science Update titles their article, Monkeys strike for justice: Capuchin umbrage suggests sense of fairness extends beyond humans. The article discusses recent experiments by Sarah Brosnan, published in this weeks Nature1, with capuchin monkeys. When they were given food for tokens, they took offence if they saw a neighbour getting a grape for a token instead of a slice of cucumber, or if another monkey got something for nothing. (Brosnan calls the reaction inequity aversion.) Some got so mad they threw their cucumbers out of the cage. The article continues, Only females show this pique, however, because ostensibly, Males care about sex, and females care about food. Charles Janson of State University of New York cautions, Capuchin monkeys can learn to do all sorts of things in captivity that they never do in the wild, so its not clear how important this ability is in the forests of South America. Notwithstanding the controversy over interpreting the work, National Geographic News is convinced that the evolution of attitudes toward fairness has been demonstrated (emphasis added): If you expect equal pay for equal work, youre not the only species to have a sense of fair play. Blame evolution. 1Sarah Brosnan and Frans B. M. De Waal, Monkeys reject unequal pay, Nature 425,297-299 (18 Sept. 2003); doi:10.1038/nature01963. We didnt learn fairness from monkeys. They learned how to sulk, pout, and throw tantrums by watching humans. Monkey see, monkey do. Actually, humans evolved altruism from dogs, especially those of us who grew up watching reruns of Lassie.The Evolution of War and The War of Evolution 09/16/2003 War originated when society became stratified between the haves and the have-nots, according to a new theory by anthropologist Joyce Marcus of the University of Michigan, published in PNAS1, reports New Scientist. Based on archaeological work in Oaxaca, Mexico, where her team examined burned structures, she feels that raiding, and later warfare, emerged where people organized into clans that competed over resources. Group violence was presumably rare in hunter-gatherer societies. 1Kent V. Flannery and Joyce Marcus, The origin of war: New 14C dates from ancient Mexico, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.1934526100, published online 09/18/2003. The conclusions being drawn from this archaeological study is political science in the Marxist tradition. Hunter-gatherers of the world, unite! Throw off the bourgeoisie with their clay pots and fired-brick dwellings. Science? Worthless.Baloney Detection Exercise 09/16/2003 Parse the following sentence, found on a bumper sticker, for logical fallacies (see our Baloney Detector for help): Dont pray in my school, and I wont think in your church. This slogan commits the following errors: (A) Either-Or Fallacy, (B) Glittering Generalities, (C) Ridicule, (D) Non-Sequitur, (E) All of the above. Click here for the answer.
Grand Canyon Sand Hails from Back East 09/15/2003 If the present is key to the past, is there anything like this happening today? Add a hawk flying around this hypothesis and you have a picturesque, ad hoc scenario.Intron Update 09/12/2003 (See Sept. 3 headline about introns). Scientists have found a possible reason why genes that contain introns are expressed more effectively than those without. Writing in PNAS1, a team from Howard Hughes Medical Institute suspects that the exon junction complex (EJC) that forms at each junction by the splicing process may give messenger RNA (mRNA) a tethering point with position-specific memory of the splicing event. EJC components may attach at the junctions to perform expediting functions. Of five known protein components of the EJC, some are known to be involved in nonsense-mediated decay, positioning of the mRNA in the cytoplasm, or transport through the nuclear pore complex (see March 4 headline). Other functions of the EJC might include stabilizing the mRNA, enhancing transcription in the ribosome, and translational utilization. They found that gene expression was enhanced by the EJC components but not necessarily by the act of splicing itself; that is apparently why some intronless genes can be expressed satisfactorily, especially if EJC proteins can be recruited through other means. Splicing may assist in the efficient formation and localization of EJC components. The stimulatory effect of splicing and the EJC can enhance gene expression more than 30-fold. 1Wiegand, Lu, and Cullen, Exon junction complexes mediate the enhancing effect of splicing on mRNA expression, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.1934877100. This opens up exciting possibilities for understanding new functions of these widespread regions of so-called junk DNA. The splicing may provide handles for a variety of molecular assistants to speed up the workflow. Undoubtedly other benefits that ensue from the work of the spliceosome machinery (see 09/12/2002 headline) remain to be discovered.Comet, Asteroid News 09/12/2003 Two solar system stories are making the rounds:
Cells Fight Mutations 09/12/2003 Maintaining the stability of the genome is critical to cell survival and normal cell growth. Inherited or acquired deficiencies in genome maintenance systems contribute significantly to the onset of cancer as evidenced by the observation that a number of the DNA-repair and checkpoint genes are mutated in cancer susceptibility syndromes and sporadic cancers. This raises the possibility that other genetic defects causing genome instability and mutator phenotypes could contribute to carcinogenesis.(Emphasis added in all quotes.) Their blind screening technique found all the known mutation suppressors, but also ten more previously-unknown nonessential genes involved in mutation suppression. Of the confirmed genes, five encode components of the oxidative-stress response, and six are genes of unknown function. We believe the data presented here define a nearly complete collection of nonessential genes involved in suppression of mutations in the CAN1 forward-mutation assay [a sample gene used for evaluating effects of mutations] and define several previously unappreciated mutation-suppression pathways.Some of the activities these genes perform are repairing base excisions, fixing oxidated guanine (G) bases, and replacing incorrectly-inserted uracil (U) bases with cytosine (C). Another one suppresses genome rearrangements. Huang, Rio, Nicolas and Kolodner, A genomewide screen in Saccharomyces cerevisiae for genes that suppress the accumulation of mutations, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.2035018100. Scientists need to get rid of these genes, because they are hindering the progress of evolution. Havent we all been taught that mutations provide the raw material for change? If these pathways are fixing all the damage, how can evolution ever make any progress? These scientists were negligent. They didnt mention evolution or praise Darwin anywhere in their paper.Texans Favor Teaching Evidence Against Darwinism 09/10/2003 Try your vote on the following choices:
Texas law requires students to analyze, review, and critique scientific explanations, including hypotheses and theories, as to their strengths and weaknesses using scientific evidence and information. Should the state board of education apply this standard to how evolution is presented in textbooks?Officials of the Discovery Institute Bruce Chapman, William Dembski, Jonathan Wells and Seth Cooper issued statements to the Texas state board of education Sept. 10, encouraging them to allow criticisms of Darwinian evolution in the science framework, and urging them to clean up factual errors in the textbooks (see July 25 headline). This latest poll tracks with similar polls in other states. Messenger: The peasants are revolting!Flamboyant Birds Hitch Up Hollywood Style 09/10/2003 An Australian biologist believes he has found a significant positive association between the degree of mutual ornamentation and divorce rate among birds. Publishing in the Biological Proceedings of the Royal Society1, Ken Kraaijeveld (U. of Melbourne) claims that birds whose males and females are both colorful or endowed with showy feathers are less likely to mate for life. Like Hollywood stars, their relationships are most likely to be seasonal flings. He feels the ancestral state was flamboyance with low divorce rate, and the current higher divorce rate appears to result mainly from a loss of ornamentation under mate fidelity. Some exceptions were noted, however. The relation is less robust for passerine birds, and the result was slightly weaker after controlling for phylogeny, although he also admits that high ornamentation in ancestral states is ambiguous when using the mtDNA-based phylogeny. Also, though he feels his finding is compatible with sexual selection theory, it leaves much of the variation in the degree of ornamentation unexplained, because the two factors (ornamentation and divorce rate) seem to vary dependently some times and independently others. The drabness of birds with low divorce rates is explained by the reduced competition for access to a new mate. Another paper in the same issue2 by evolutionary biologists from Sweden and Canada also discusses sexual selection in birds, this time the relation between sexual selection and extinction risk, which has rarely been investigated. They conclude, unexpectedly, that sexual selection appears to be a double-edged sword, promoting speciation on the one hand but promoting extinction on the other. 1Ken Kraaijeveld, Degree of mutual ornamentation in birds is related to divorce rate, Royal Society Proceedings: Biological Sciences 270:1526, pp. 1785-1791, DOI 10.1098/rspb.2003.2450. 2Edward H. Morrow and Trevor E. Pitcher, Sexual selection and the risk of extinction in birds, Royal Society Proceedings: Biological Sciences 270:1526 pp. 1793-1799, DOI 10.1098/rspb.2003.2441. Has it come to this? Imputing human marital feelings to birds? I suppose the lesson is, If you want to stay married, the more drab the better; dont wear designer clothes, and dont be well groomed. As if birds care a tweet. Question: how did they measure the divorce rates of fossil birds? |