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Flight is difficult to achieve, hardly the type of thing that one would expect to develop from chance. Successful flight requires great attention to detail of structure, propulsion, aerodynamic surfaces, structural dynamics, and stability and control. In 2003 we will reach only the 100th anniversary of flight by humankind. Do we really think we are so smart and so advanced that we cannot reflect upon and give credit to the Intelligent Designer of earliest flight? | |||||||||||||||
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Scientists have a new theory on why birds evolved from dinosaurs, according to EurekAlert: oxygen was low, so they had to evolve bird lungs. Peter Ward (of Rare Earth fame: see Jan 14 headline), teamed up with U. of Washington paleontologists to surmise that twice in the past, 275 million and 175 million years ago, oxygen levels sank and temperatures rose to make it hard to breathe. At sea level, it would have felt like high altitude. This contributed to the Permian extinction, they think, causing the extinction of 90% of living species, and may have contributed to the Triassic-Jurassic extinction, too. Part of the motivation for the new idea is the supposition that the extinctions were drawn-out events, not sudden happenings that might have been explainable by an asteroid impact. Ward hypothesizes that large sauropods had breathing apparatus that was unhindered by the low oxygen levels, whereas mammal-like reptiles and true mammals were hit particularly hard. Those who evolved survived; those who didnt, choked and croaked: In addition, Peter Ward, a UW professor of biology and Earth and space sciences, believes the conditions spurred the development [sic] of an unusual breathing system in some dinosaurs, a group called Saurischian dinosaurs that includes the gigantic brontosaurus. Rather than having a diaphragm to force air in and out of lungs, the Saurischians had lungs attached to a series of thin-walled air sacs that appear to have functioned something like bellows to move air through the body.So in other words, The reason the birds developed these systems is that they arose [sic] from dinosaurs halfway through the Jurassic Period. They are [sic] how the dinosaurs survived, Ward said. The team seems to accept the hypothesis that later, at the Triassic extinction 65 million years ago, an asteroid wiped out the dinosaurs, but spared the birds and mammals. If you took all the best evidence that evolutionists could muster for their theory that humans evolved from bacteria and filtered it through the rigorous demands of science (i.e., that the evidence must be observable, testable and repeatable), would anything be left? Look at this magical, mystical tale. They have no way of knowing what oxygen levels were back when. They have no way of knowing what caused the extinctions, or of dating them back there in unobservable zillions of past years. The only thing that is observable is that we have mammals and birds alive today, and dinosaur bones in the rocks. From this, they weave a fantastical story that low oxygen levels somehow created exquisitely-designed lungs that allow birds to soar above the mountains. Thank goodness there were not flying brontosaurs.At Last: Evolution Found 10/31/2003 Any article with a title like this has to cause a reader to stand up and take notice: Scientists find evolution of life. Unless its just a Halloween prank, thats how EurekAlert announced their summary of work by scientists from UC Riverside and Lawrence Livermore National Laboratory, as published in the Oct. 31 issue of Science. Ridgwell, Kennedy and Caldeira discovered [sic] that the increased stability in modern climate may be due in part to the evolution of marine plankton living in the open ocean with shells and skeletal material made out of calcium carbonate, the news item states (emphasis added in all quotes). They conclude that these marine organisms helped prevent the ice ages of the past few hundred thousand years from turning into a severe global deep freeze. The idea is that without the buffering effect of these shells, the oceans would suck the greenhouse gas -- carbon dioxide out of the atmosphere -- making the Earth colder, promoting an even deeper ice age. This is presumably what happened in the Precambrian, when (as some contend) runaway glaciation produced a Snowball Earth. Once shelled plankton evolved, however, they were able to buffer the planet from such catastrophes. The report does not specify how these calcium carbonate shells evolved or emerged from precursors that did not have them (see Sept. 22 headline). Nevertheless, the emergence of shelled plankton might have helped additionally when we humans were first coming along: The most recent ice ages were mild enough to allow and possibly even promote the evolution of modern humans, Caldeira said. Without these tiny marine organisms, the ice sheets may have grown to cover the earth, like in the snowball glaciations of the ancient past, and our ancestors might not have survived. Ahem, were waiting. We see a story, based on a lot of suppositions, but we were expecting an earth-shaking announcement that evidence for the evolution of life has been found. We have been waiting in line for a long time. Thank you for the sidewalk entertainment, but please: cough up the evidence promised, or we want our money back. We might even sue you for bait and switch.Cave Deposits Reveal Million-Year Record of Evolution 10/30/2003 From deep in a Colorado cave comes a tale of owls, packrats and fossil teeth, recounted in UC Berkeley News. Tony Barnosky (paleobiologist at UC Berkeley) and colleagues have been mapping layers of deposits from Porcupine Cave that they claim tell a remarkable evolutionary story covering a million years. The story begins with owls swooping down on sagebrush voles (small, gopher-like animals), devouring them, then later coughing up pellets containing fur, bones and teeth. These pellets are then picked up by packrats and stored in their nests. Barnosky claims that packrats had been doing this at Porcupine Cave for 400,000 years, leaving a layered record in which changes to bones and teeth can be examined. The team has been studying this cave since 1985. They have examined over 200 teeth from the cave and compared them with 363 modern specimens. They found slight changes in the teeth of the voles, which they attribute to climate changes assumed to have taken place 800,000 years ago. Since the time interval represents only a small part of the typical 1.5-million-year life span of a mammalian species, however, he admits that all the voles in the deposits represent one species. Moreover, the sagebrush vole today is probably the same species as that of 800,000 years ago, he confesses, although he believes changes in the teeth clearly indicate the vole is evolving to adapt to more arid conditions. The tooth changes primarily involve triangular patterns on molars that presumably provide more cutting surface area that would not grind down as quickly. Early voles had four of these molar triangles, whereas modern ones have five, six, or even seven. He believes he sees a gradation period during which interbreeding was common, leading to a time when more molar triangles gradually predominated. The cave deposits do not include any precursors to the sagebrush vole. Because fossils of the sagebrush vole are not found before the species appears full blown in Porcupine Cave, Barnosky thinks that the sagebrush vole had only recently evolved, the article states (emphasis added). Barnoskys teams paper is published in the Oct. 21 Royal Society Proceedings B and will be the subject of a book to be published next year. The research was funded in part by the National Science Foundation. This story is so weak as to be hilarious. Here it is touted as a million year record of evolution, but for all that assumed time, what happened? Slight changes to tiny surface areas on teeth within one species. Is this all evolutionists can come up with? If the lifetime of a mammalian species is supposed to be 1.5 million years (pray tell, how is this calibrated?), then there should have been considerably more evolution in this little mammal than adding one or two molar triangles. It would not be surprising if more variation in teeth were found between living voles than that identified from these fossil deposits. Where is the evolution? An unbiased evaluator of this story would expect much, much more evidence than tiny changes in tooth shape.Textbook Publishers Fix Errors About Evolution (Partially) 10/30/2003 It appears that the Discovery Institutes campaign to get textbook publishers to clean up their act in presentations of Darwinian evolution have met with partial success (see July 25 headline). According to their press release 10/30/2003, at least 10 corrections have been made (see their background document), but significant problems still remain. Now the textbooks contradict each other, and quite a few other factual errors are still in print. Discoverys documents make for good reading and are self explanatory. It is inexcusable for textbook writers to continue to propagate fallacious notions, such as the myth that human embryos have gill slits or that Haeckels embryos demonstrate evolutionary ancestry. Just setting the record straight would go a long way toward bringing creation-evolution confrontations between parents, educators and politicians into the sphere of rational discussion. It wastes a lot of time having to undo the miseducation and misinformation implanted in peoples heads from their high school biology classes. If adults of high schoolers, supporters of the NCSE and ACLU, and school board members really understood how much of their faith in Darwinian evolution was built on false and irrelevant claims, they would probably act more rationally at school board meetings.Pterosaurs Had Advanced Aerobatics and Guidance Technologies 10/29/2003 Not clumsy, awkward gliders were they. Pterosaurs were masters at detecting fish under the water and swooping in efficiently for the catch. This from detailed computer modeling of the brains and ears of pterosaurs from analysis of their skulls, performed by Witmer et al. of Ohio University published in the Oct. 30 issue of Nature1 (see reports on EurekAlert, National Geographic News and New Scientist, and News and Views summary in the same issue of Nature by David Unwin2). The team used X-ray tomography to infer that the flying reptiles had exceptional guidance and control systems that probably allowed them to perform complex aerobatic manoeuvres while keeping their gaze firmly centred on their prey. says New Scientist. EurekAlert adds, they found key structures to be specialized and enlarged, a discovery that could revise views of how vision, flight, and the brain itself evolved. 1Witmer et al., Neuroanatomy of flying reptiles and implications for flight, posture and behaviour, Nature 425, 950 - 953 (30 October 2003); doi:10.1038/nature02048. 2David M. Unwin, Paleontology: Smart-winged pterosaurs, Nature 425, 910 - 911 (30 October 2003); doi:10.1038/425910b. What does this have to do with evolution? EurekAlert, an arm of the National Science Foundation (NSF), feels compelled to throw in an evolutionary mythoid built on futureware. These scientists found already existing advanced technology in extinct creatures. No gradual chain of transitions leading up to an animal that could fly, home in on a target, maneuver and dive has been found. National Geographic dreams that pterosaurs were the first of only three vertebrates to evolve [sic] flight. Birds, close cousins [sic] of pterodactyls, are believed to have evolved [sic] from theropod dinosaurs about 150 million years [sic] ago. Bats are mammals thought to have evolved [sic] from shrew-like creatures about 50 million years [sic] ago. (Emphasis added.) Its time scientists and their toady reporters stop mentally placing these spectacularly designed animals into imaginary evolutionary trees, and just admire their awesome capabilities. The discovery could revise views of how vision, flight, and the brain itself evolve, all right, if and only if revise means overthrow.Fruit Helps Prevent Skin Cancer 10/29/2003 According to several studies summarized on EurekAlert, Fruits offer powerful protection against skin cancer. Citrus fruits, grapes, cherries, mint and pomegranates are some of the fruits mentioned in the studies as sources of effective anticancer agents. Hmmm...Adam and Eve ate a lot of fruit...hmmm...Adam and Eve did a lot of sunbathing...Hmmm...Scientists Argue Over Age of Deep Sea Vents 10/28/2003 Both BBC News and Nature Science Update report that geologists are arguing about the age of rocks around deep sea vents. The common idea since the 1980s is that they date back billions of years, but newer findings suggest just thousands. The disputes revolve around greenstones and ironstones and stalactites that the young-age camp says could not have survived for so long. Some other difficulties of the old age are noted by NSU: Paul Knauth used de Rondes estimated age for the pods [3.5 billion years] to calculate the salinity of the ancient ocean. He now believes that he was wrong. Quite a few people - including me - have been burned by this, says Knauth, who works at Arizona State University in Tempe. Other researchers have drawn similar conclusions about the seas depth, temperature and chemical makeup.Knauth said I was flabbergasted when shown evidence by Lowe and Byerly, who argue for an age of 100,000 years. Its obvious if you look at these things that theyre very recent, he said. The de Ronde party claims hematite could only have originated at temperatures of several hundred degrees (hotter than todays vents), and that delicate features in South African greenstones, thought to be remnants of early deep sea vents, could not have survived mineral replacement scenarios postulated by the opponents. Debate also centers on the contribution by deep sea vents of ocean minerals and salts. But there seems to be another motivation for keeping the old date: maintaining the role of deep sea vents in the origin of life. Martin Brasier (U. of Oxford) stated emphatically, Theres a very strong connection between the signature of life on the early Earth and hydrothermal processes. This isnt going to break the paradigm. Brasier may be emphatic primarily because chemical evolutionists have been pushed into a corner with fewer and fewer options, since the heyday of Miller and Urey in the 1950s. With the old primordial soup myth pretty much defunct, and panspermia too far fetched for most scientists, deep sea vents provided promising incubators for life, some believed. No way are they going to let anyone take these venues away, too.Stupid Evolution Quote of the Week 10/24/2003 Speaking of biotherapy (see next headline), John Church said, Its a highly sophisticated natural means of achieving certain ends. Natures been doing research and development on this for 300 million years. All weve got to do is cash in on that fact. Source: National Geographic News. Next dumb story.
Biotherapy: Pour in the Happy, Hungry Maggots
10/24/2003 Add this to the column, Things considered pests, vermin, nasty and ugly today might have originally had beneficial purposes. (See also March 14 headline). Other examples of biotherapeutic agents being studied include leeches and bees.Baloney Detecting Exercise 10/24/2003 Jack Szostak at Howard Hughes Medical Institute claims to have a proof-of-principle that growth and division is possible in a purely physical-chemical system. Though he cautions, We are not claiming that this is how life started, he does say, we have demonstrated growth and division without any biochemical machinery. Your assignment is to apply the Baloney Detector to this article. You are permitted to view the film Unlocking the Mystery of Life, and access the past three years of chain links on Origin of Life for supporting material. Ready, begin... Next headline on: Origin of Life.
Cosmology: Greater Wall Discovered
10/24/2003 The theory must survive at all costs. No observation may be considered valid unless it has been first confirmed by theory.Gene Evolution: A Classic Case Revisited 10/24/2003 Evolutionists lately have leaned heavily on gene duplication as a source of functional novelty. As the story goes, after a gene duplicates, one continues functioning, and the other is free to mutate and evolve. The evolution of the copy (paralog) might involve neofunctionalization (acquisition of a new function) or subfunctionalization (splitting up of functions, like a semitrailer truck dividing into a smaller truck and a storage bin; see also 12/16/02 headline). Are there examples in nature? A prototypical example has been the Xdh gene that codes for xanthine hydrogenase (XDH). This enzyme exists in all life forms, but has a paralog Ao in eukaryotes that codes of aldehyde oxygenase (AOX), and another in vertebrates (AOX') that, surprisingly, is more similar to Xdh than to the Ao in invertebrates; additionally, it is lacking in a protochordate assumed to be an ancestor of vertebrates. This indicates to the authors of a paper by Francisco Ayala and colleagues in PNAS1 that the gene duplicated twice and evolved toward convergent functions. Other than that unexpected feature, all three enzymes share similar sequences and differ only in their electron receptors and substrates. The authors feel, therefore, that they have demonstrated evidence for positive Darwinian selection (neofunctionalization): In mammals, XDH interconverts with an oxidase form [xanthine oxidase (XO)], which, like AOX, uses dioxygen as the final electron acceptor. Interconversion is caused by dislocation of the active-site loop, a stretch of several consecutive amino acid residues (Gln 423-Lys 433, in bovine XDH) that surrounds the FAD cofactor. AOX and XDH can easily be aligned along their entire lengths. This, jointly with the fact that Xdh is ubiquitous in the tree of life, whereas Ao is circumscribed to, but pervasive through multicellular eukaryotes, indicates that Ao evolved from a eukaryotic copy of Xdh some time before the origin of multicellularity.In their analysis, they find that both AOX and AOX', though separately evolved, seemed to converge on similar structural pockets for their substrates. This argues that positive selection for function was active, not just neutral mutational drift. 1Rodriguez-Trelles, Tarrio, and Ayala, Convergent neofunctionalization by positive Darwinian selection after ancient recurrent duplications of the xanthine dehydrogenase gene, Proc. Natl. Acad. Sci. USA, 10.1073/pnas.1835646100, Published online before print October 23, 2003. Whenever we see a title hinting that positive Darwinian selection for a new function has been demonstrated, we get excited, because maybe now this theory that has taken over the world will finally exhibit some empirical evidence. But what have we here? All they have shown are three enzymes that look similar, but operate on different substrates. Two of them operate on the same substrate but have slightly different structures. To make their story work, they have to invoke the miracle of convergent evolution acting on two separate gene duplications.News from Nature 10/23/2003 The Oct 23 issue of Nature has a number of tidbits of interest:
Next headline on: Human Body. Next headline on: Genes and DNA. Next headline on: Politics, Ethics, History. Next headline on: Geology. Next headline on: Darwinism.Ribosome Does Fast Forward Scanning 10/23/2003 Remember cassette players that allowed you to scan ahead to the next song? Ribosomes in the cell are like tape readers that can translate one message, written in DNA, to another message, written in proteins. The tape that the ribosome reads is a string of messenger RNA, freshly delivered from the DNA code in the nucleus by other molecular machines. Once the tape is inserted into the ribosome, it reads the message and ties amino acids together to form a protein chain. If you watched the film Unlocking the Mystery of Life, you saw a computer animation of the process in slow motion. Now it appears that the ribosome has a scan function. Scientists have known about a puzzling phenomenon that occasionally occurs within the ribosome. For unknown reasons, the ribosome can disengage its reading head from the tape and fast-forward to another spot, then continue reading and translating at the next open reading frame (ORF). This is called translational bypassing. They know that this is signalled automatically by codes embedded in the messenger-RNA tape: a take-off code and a landing code, among others. What they didnt know is whether the reading head continues to scan the code while disengaged. By analogy with cassette players, is it fast forward or scan? Apparently, its the latter. A team of scientists at the University of Washington figured this out by rigging two landing codes into the tape. They found that the ribosome always took the first one. This can only mean that the ribosome is able to scan the message while disengaged and detect the presence of the landing site. Their paper is published in the Oct. 23 online preprints of PNAS.1 Although it is still unclear why the ribosome would want to jump ahead on the recording, other researchers, like Raymond F. Gesteland, believe it is part of a bag of tricks the cell has to regulate gene expression or correct errors. 1Gallant et al., Evidence that the bypassing ribosome travels through the coding gap, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.2233745100, Published online before print October 23, 2003. There is so much more to learn about genes, proteins, and the processes that translate and regulate them. So far, the more we know, the less plausible evolution appears. Consider what must be true for scanning to occur. Both the DNA and the ribosome have to understand the coding convention; i.e., which codon means stop, which codon means take-off, and which codon means landing. There needs to be a clutch mechanism in the ribosome that can disengage the growing peptide chain and stop the influx of loaded transfer RNAs. There needs to be processive scanning; the ribosome needs to be constantly reading and understanding the message, even when not translating it. There needs to be a reliable way to re-engage the translation machinery at exactly the right nucleotide, and there needs to be a way to join the translated frames into a seamless product.More on the Nobel Controversy 10/22/2003 (See Oct. 10 headline.) Fonar Corporation, the MRI scanner company founded by Dr. Raymond Damadian, has produced more documentation backing up their claim that the exclusion of Damadian from the 2003 Nobel Prize for Medicine or Physiology was A shameful wrong that must be righted
Cone snails (genus Conus) are venomous molluscs living in the sea. With 500 species, they comprise arguably the most species-rich genus of living marine invertebrates, say a team of biologists mostly from the University of Utah, writing in a Colloquium for the Proceedings of the National Academy of Sciences1. The beautiful shells of these animals, shaped somewhat like miniature Greek urns with spiral-shaped tops, decorated with elaborate mosaic patterns reminiscent of Moorish art (see this gallery), are prized by collectors and have won them admiring names like glory-of-the-sea and cloth-of-gold. (For more on shells, see June 26 headline.) One wouldnt think these little gems would be predators, but everythin gotta eat. Depending on the species, cone snails prey on fish, worms, and other molluscs with a unique biological weapon: protein venom. And what an arsenal they have: among the 500 species, biologists estimate they can produce 50,000 different venom peptides. (Some can even kill a human see this website but some of the molecules also have potential medical uses.) Most of these are short chains of amino acids less than 100 units long; some as short as 12 to 20. These short polypeptides are produced, in turn, by enormous numbers of genes: The analysis carried out on Conus venom peptides suggests that a majority of the estimated ~50,000 peptides are encoded by only ~12 conotoxin gene superfamilies. These superfamilies have undergone rapid amplification and divergence, accompanying the parallel radiation and diversification of Conus species at a macroevolutionary [sic] level. ... Each major Conus peptide gene superfamily comprises thousands of genes, encoding different peptides. This leads to the remarkable functional diversity seen among the ~50,000 different peptides.These peptides exert a powerful effect on some specific ion channel or receptor target in their prey. The sheer number of peptides these animals can manufacture is staggering. The authors put it in perspective: It is fair to say that the snails likely have evolved a greater diversity of ion channel-targeted pharmacological agents than even the largest of pharmaceutical companies (this diverse array includes peptides that are being developed for use as human pharmaceuticals). These venom peptides have allowed different cone snail species to specialize on at least five different phyla of prey and defend themselves against a spectrum of predators that might be even more diverse.Following this awe-inspiring introduction, the authors delve into the biochemical details of the venoms of just two species, and then make some generalizations about their putative evolution. Most proteins and enzymes are longer than 100 amino acid units, probably because they must be that long or longer to fold into functional three-dimensional structures. The cone snail venom peptides, though much shorter, also need to fold in a precise way. Their folds are held in place by disulfide bridges connecting cysteine residues. These cross-links must be formed between the correct cysteine residues: something needs to guide the bridges to the correct attachment points. This is the role of the PDI family of enzymes (protein disulfide isomerase). After a venom is produced by the translation machinery in the ribosome, another enzyme (gamma-Glutamyl carboxylase) modifies certain glutamate residues into gamma-carboxyglutamate, which presumably also aids the folding process. As the peptide is transferred from a reducing environment in the cytosol to an oxidizing environment in the endoplasmic reticulum (ER), folding is enhanced by PDI in the presence of doubly-ionized calcium (Ca2+). The gamma-carboxyglutamate residues, binding to the calcium, may serve as handles for the enzymes, orienting the cysteine residues in such a way that the PDI enzyme can associate them to form the correct disulfide bridges. (The authors feel what they have observed may help elucidate the more general problem of protein folding.) The final peptide is not activated until it is ejected from the venom duct, so that the venom does not jeopardize the cone snail itself. The authors speculate about the evolutionary relationships between cone shells, insects, humans, and the common ancestors of each. Because gamma-Glutamyl carboxylase is a highly conserved enzyme, involved in everything from human blood clotting to Conus venom, they feel its role in protein folding was the ancestral function: Such a folding mechanism for proteins may have been more generally important earlier in evolution, but it was probably largely supplanted later by other mechanisms for facilitating folding of larger polypeptides, such as specialized molecular chaperones. 1Bulaj et al., Colloquium: Efficient oxidative folding of conotoxins and the radiation of venomous cone snails, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.2335845100, published online before print Oct. 22, 2003. These scientists did yeomans work with PCR and other lab techniques, but that does not qualify them as just-so storytellers. Watch them launch into Storybook Land (emphasis added):Minnesota Evaluates Science Standards 10/21/2003The role of Gla [gamma-carboxyglutamate] suggested above provides an attractive general mechanism for folding small polypeptides, perhaps even including the primordial [sic] proteins. Based on structural work on signal recognition particle peptides, it was recently suggested that the first proteins evolved [sic] as membranes formed [sic], when RNA still dominated biochemistry [sic]. Specifically, the first functional polypeptide-like chains in incipient [sic] life forms were created [sic] to deal [sic] with a membrane surrounding the catalytic/informational [sic] RNA. If this view is correct, then the possibility is raised that gamma-carboxyglutamate, with its capacity both for interacting with membranes and directing folding may have been present in the earliest functional polypeptides [sic], which were presumably much smaller than present-day proteins. Once a Ca2+-free cytosol evolved [sic], however, a doubly negatively charged amino acid might become a liability [sic] for intracellular protein function, and in most taxa at the present time, gamma-carboxyglutamate is probably largely a relict amino acid in a few secreted proteins. This modification remains prominent only in those present-day phylogenetic systems [sic] where more specialized uses have evolved [sic] (such as mammalian blood clotting and Conus venom peptides).Notice how many wiggle words and evolutionary assumptions are embedded in this one paragraph. They even twist the C word into evolutionary meaning: life forms were created... (in their worldview, the creator is time and chance). Minnesota is another state considering changes to its science standards. The Discovery Institute praises the first draft of the standards for stating that Students will be able to explain how scientific innovations and new evidence can challenge accepted theories and models, including cell theory, atomic theory, theory of evolution, plate tectonic theory, germ theory of disease, Big Bang theory. There is room for improvement, however, writes Seth Cooper of the Institute: benchmarks pertaining to neo-Darwinian evolution remain incomplete by failing to address the scientific controversy that exists surrounding the theory. Discovery Institute has supplied a proposal to correct shortcomings, in hopes of bringing the standards in line with the Santorum Amendment. This is the official policy of Congress on the subject. It was explained in the journal report as follows: where topics are taught that may generate controversy (such as biological evolution), the curriculum should help students to understand the full range of scientific views that exist, why such topics may generate controversy, and how scientific discoveries can profoundly affect society. This debate is a propaganda magnet in school boards across the country. It is generating vociferous arguments, often with more heat than light. It is essential to be informed on the issues. Cooper praises the Minnesota Commissioner of Education for pointing out that, in the standards, nowhere does this language mention intelligent design or creationism. Instead, it simply states the idea that children should understand that there is diversity of opinions and beliefs. Even if it mentioned either concept, the standards would remain constitutional, as long as scientific evidences alone, not religious arguments, are presented.Guest Commentary 10/20/2003 This entry submitted by a reader demonstrates that our Baloney Detector is proving helpful. Re: Sexual Identity Hard-Wired by Genetics, Study Says, Reuters News Service The headline claims to have found that sexuality (i.e. homosexuality or heterosexuality) is hardwired. But when you actually look at the science all they found is that male and female mices brains are different. One would think that this shocking discovery that males and females are physically different (not just in the most obvious ways) would lead to the opposite conclusion. However, the implication here is that the brains of homosexuals are different from their straight counterparts in the same way as between the sexes. However this is not what the study found at all, and the very real possibility is that it might well be the exact opposite. Scientists have been earnestly trying to find some genetic justification for accepting homosexuality as natural, but to claim to have found this link when the facts couldnt be further from the truth sounds pretty desperate. In addition, Im not sure finding some inherent difference would change the moral question any more than discovering why some people have an increased natural tendency toward violence, pedophilia, or cannibalism. There was another story in the past that made a similar claim, but all they found was that lesbian women werent as easy to startle...hardly scientific proof of a genetic difference. Good detection work. (For a different interpretation, see World Net Dailys report on this story.) Whenever you hear an outrageous claim made in the name of science, hack away at the interpretation with an intellectual machete and get to the data (if any), buried in the midst of the thorny thicket of bluffing words, non-sequiturs and other fallacies. Look at the raw data with a critical eye, then draw your own logical conclusion.Next headline on: Politics and Ethics.
Homo erectus Was Fully Human
10/20/2003 If hardy teams of H. erectus reached Flores [an island off Bali] by sea, their mode of transportation remains unknown. Some scientists suspect that small numbers of Stone Age folk accidentally [sic!] drifted as far as Flores after climbing onto thick mats of vegetation that sometimes form near the Southeast Asian coast.So Bednarik and crew built a bamboo craft with stone tools and set out to sea. The harrowing voyage, through tropical storms and 16-foot waves, was successful. After paddling furiously 12 hours, and fixing broken masts and sails with their stone tools, they reached a nearby island, fatigued and dizzy, but alive. Bednarik is director of the International Institute of Replicative Archaeology in South Caulfield, Australia. He has been bucking the current to show not only that Homo erectus was capable of building boats and navigating the open sea, but also possessed a culture, whose art and tools imply communication with spoken language and symbolic thought. Bednarik has no qualms about paddling against the academic mainstream, Bruce Bowers reports. Over the past 30 years, hes become a self-taught authority on Stone Age rock art. Hes written hundreds of scientific articles and now edits three journals, all without having attended a university or earned an academic degree. Bowers compares him to Thor Heyerdahl, who upset the mainstream in 1947 with his theories of Polynesian island-hopping sailors. Some scientists are entertaining the possibility that Bednarik is right. Others are skeptical and cling to the old story. To these, Bednarik taunts, Armchair archaeologists, who think that sea crossings are a piece of cake, really ought to try doing this on drifting vegetation. His next project is to sail to Sardinia from Greece, and across the Strait of Gibraltar, on cane rafts. For more information, see the First Mariners Project website. On a related subject, the BBC News explores the controversy over artwork found in Italy alleged to be from H. erectus. Mainstream scientists cannot believe pre-humans living 150,000 or more years ago were capable of art, and attribute the face-like structures to geological processes. Then there is a figurine in Morocco claimed to be 400,000 years old. 1Bruce Bowers, Erectus Ahoy: Prehistoric seafaring floats into view, Science News Week of Oct. 18, 2003; Vol. 164, No. 16. What a great story on courage to challenge the mainstream. Both sides are still corrupted by the fallacious dating of alleged human ancestors, but at least Bednarik got out there and did some real experiments, even to the point of putting his life in danger. Talk is cheap because the supply exceeds the demand. Science is supposed to be about observation and experimentation, not mere talk. Its easy to spin a tall tale about floating on a mat of vegetation, but go try it sometime in 16-foot waves!Quick Cure for Some Genetic Diseases Planned 10/17/2003 Certain forms of muscular dystrophy and cystic fibrosis may soon be curable with a pill, says New Scientist. The pill helps the protein-building machinery read through the stop code in a defective gene so that an essential protein can be made. Experimental tests with the drug, named PTC124, may begin on humans next year. If it works, this will be wonderful news for many who suffer from these diseases. The mechanism of the cure points out the specificity of the genetic code. When the stop code is correctly located, the ribosome knows when the protein ends, and all is well. If a premature stop code has been inserted in the gene by a mutation, protein construction is aborted, and the incomplete polypeptide is destined for destruction. The new drug has a way to latch onto the stop code and prevent it from being interpreted as such. Its like putting a cover over a stop sign, or commenting out an extraneous EXIT directive in a computer script.Editorial 10/16/2003 Raymond Damadians campaign against the Nobel Committee (see Oct. 10 headline) got prominent attention in the 10/16 issue of Nature. See the update. Today, Science acknowledged the priority of Damadian but sided with the Nobel decision. This is odd, considering Damadians paper was published in Science before Lauterburs was published in Nature. Gretchen Vogel, author of the news article, quotes an MRI expert who claims Damadians idea did not lead to todays MRI. Yet the Fonar website lists a number of other expert witnesses, including the Supreme Court, who claim otherwise. For an undisclosed reason, Damadian did not respond to Sciences requests for comment. Important people are often too busy to meet a publishing deadline. Enough documentation, going back 30 years, is available to anyone who wishes to examine it. One would certainly assume Damadians original 1971 paper in their own journal would suffice. See also 10/22/03 update.
Titans Oceans and Other Saturnian Mysteries
Await Cassinis Probing Eyes
10/16/2003 1Campbell, Black, Carter and Ostro, Radar Evidence for Liquid Surfaces on Titan, Science Vol. 302, Issue 5644, 431-434, October 17, 2003, 10.1126/science.1088969. 2Ralph Lorenz, The Glitter of Distant Seas, Science Vol. 302, Issue 5644, 403-404, October 17, 2003, 10.1126/science.1090464. Earth-based instruments have done just about all they can do at this point to determine the nature of Titans mysterious surface. It is one of the most bizarre locales in the solar system. No other moon has a substantial atmosphere. Titan has 10 times the nitrogen density of Earth, and 1.5 times the atmospheric pressure. The Huygens probe will descend for over an hour through the atmosphere and then measure the surface with multiple instruments for about 30 minutes. It is prepared to survive in solid or liquid. The Cassini orbiter will supplement the adventurous Huygens mission by making over 44 near encounters with Titan, mapping the entire globe with visible, infrared, and radar instruments.Life Found in the Genome Desert 10/16/2003 Southwestern deserts are often filled with living things, if you look closely enough. Similarly, the deserts in the human genome, only sparsely populated with protein-coding genes, are turning up some surprising functions. Four California-based geneticists published a paper in Science Oct. 17 that found long-range enhancers in these regions: Approximately 25% of the genome consists of gene-poor regions greater than 500 kb [kilobases], termed gene deserts. These segments have been minimally explored, and their functional significance remains elusive. One category of functional sequences postulated to lie in gene deserts is gene regulatory elements that have the ability to modulate gene expression over very long distances.They found evidence that this is true, and scientists had better pay attention: The demonstration that several of the enhancers characterized in this study reside in gene deserts highlights that these regions can indeed serve as reservoirs for sequence elements containing important functions. Moreover, our observations have implications for studies aiming to decipher the regulatory architecture of the human genome, as well as those exploring the functional impact of sequence variation. The size of genomic regions believed to be functionally linked to a particular gene may need to be expanded to take into account the possibility of essential regulatory sequences acting over near-megabase distances.(Emphasis added in all quotes.) 1Nobrega, Ovcharenko, Afzal, and Rubin, Scanning Human Gene Deserts for Long-Range Enhancers, Science 23 June 2003; accepted 8 September 2003, 10.1126/science.1088328. A man walked into a desert at high noon, saw nothing but sand, and concluded, Theres no life here. Was he being a good scientist? Notice how geneticists have focused their gaze primarily on genes, and considered these gene-poor deserts uninteresting. There may be much more than meets the eye. At night, a desert can come alive with owls, coyotes, beetles, and moths; by day, a snake or lizard might be just over the next dune. It would seem a scientist who believes in intelligent design would be more motivated to ask, Wonder what that region is there for?, while an evolutionist might conclude, Thats just leftover junk from our animal past. A Nobel prize winning biologist recently said as much (see Aug. 24 headline).Convection Can Copy DNA 10/15/2003 Nature Science Update talks about a new method that uses convection to speed up copying of DNA strands. It still uses the older PCR (polymerase chain reaction) method, which uses a DNA-copying enzyme (DNA polymerase). The convection current does away with the need for alternating hot and cold cycles. Though the intent of the invention was to assist lab workers, the researchers took a moment to speculate about convections possible role in the origin of life: The researchers suggest that convection in natural systems on the early Earth - for example, near undersea volcanic vents - might have helped to drive the replication of primitive information-carrying molecules akin to DNA. Our baloney alert just went off. This was a complex process using an already-available complex enzyme. It has nothing whatever to do with the origin of life. What are primitive information-carrying molecules, for crying out loud? Information is not information if there is no function. To be or not to be is not information if there is not a human who understands that is the question.Living Fossil Frog Found 10/15/2003 An unusual amphibian dubbed the coelacanth of frogs has been found in India. Scientists have placed this one-in-a-century discovery in its own family, according to S. Blair Hedges in Nature1 Oct. 16 (see also National Geographic News). The specimen, found and described by Biju and Bissuyt in the same issue of Nature,2 comes from a line they estimate to have diverged from the Neobatrachia (advanced frogs) some 130 million years ago. 1S. Blair Hedges, Biogeography: The coelacanth of frogs, Nature 425, 669 - 670 (16 October 2003); doi:10.1038/425669a. 2S. D. Biju and Franky Bossuyt, New frog family from India reveals an ancient biogeographical link with the Seychelles, Nature 425, 711 - 714 (16 October 2003); doi:10.1038/nature02019. Finding a new organism is always exciting, but right away, the evolutionists run from Adventureland to Fantasyland via Mr. Toads Wild Ride, tell their Mad Hatter tale, and lead the news media in the chorus, Its a small, small Darwinian world. To impress the tourists, they pull out their bag of story-building tricks, like Bayesian inference (which being translated, means Darwin in, garbage out), heuristic maximum parsimony, bootstrapping, likelihood models, molecular clocks, phylograms and such. They run their bells-and-whistles software programs like Modeltest and MrBayes, all built on evolutionary assumptions. Then they pour this contaminated mixture with the frog into the blender, mix well, and hand you a green evolutionary story to swallow.Is Darwins Theory Going Out of Style? 10/14/2003 Darwin was famous for his theory of natural selection (NS) as the primary mechanism for evolution, but NS seems to have been artificially unselected in a paper by American and Chinese scientists published online 10/13/2003 in the Proceedings of the National Academy of Sciences1. Their paper is still evolutionary, but portrays the Darwinists as the opposing team A key question in the evolution of biological complexity is, how have integrated biological systems evolved? Darwinists proposed natural selection as the driving force of evolution. However, the striking similarities between biological and nonbiological complexities have led to the argument that a set of universal (or ahistorical) rules account for the formation of all complexities. The yeast protein interaction network is an example of a complex biological system and contributes to the complexity at the cellular level. By analyzing the growth pattern and reconstructing the evolutionary path of the yeast protein interaction network, we can address whether or not network growth is contingent on evolutionary history, which is the key disagreement between the Darwinian view and the universality view. (Emphasis added in all quotes, and embedded references deleted.)Their paper examines yeast networks and finds correlations between like proteins. In the conclusion, the authors again position themselves opposite the Darwinists on the game court: The key disagreement between the Darwinian view and the universality view on the evolution of biological complexity is the role of historical contingency. Undoubtedly, efforts to search for universal rules benefit our understanding on biological complexity. However, by using the yeast protein interaction network as an example, we observed a correlation between network evolution and the universal tree of life. This observation strongly argues that network evolution is not ahistorical, but is, in essence, a string of historical events. 1Qin, Lu et al., Evolution of the Yeast Protein Interaction Network, Proceedings of the National Academy of Sciences USA, 10.1073/pnas.2235584100, published online Oct. 13, 2003. Poor Charlie is having a hard time. Hes becoming the new Rodney Dangerfield. The evolutionists think they have something better now: universal self-organizing principles things just spontaneously self-organize into complex systems. Take aim, all creationist hunters: theres a sittin duck fer ya.Would Darwin Have Agreed with Mendel, or Vice Versa? 10/14/2003 It is one of the great What-if? questions in the history of biology. What if Gregor Mendel and Charles Darwin had met? asks Nigel Williams in the Oct. 14 issue of Current Biology.1 What might have been the outcome for nineteenth century biology if both had grasped the significance of each others work? All we can do is speculate. Mendel apparently came within 20 miles of Darwins house when he visited London for the Great Exhibition of 1851 (eight years before publication of the Origin of Species), but Darwin was indisposed with family matters at the time. They probably never met. Williams thinks it unlikely, even if they had, that either man would have had a favorable meeting of minds: But others believe Mendel and Darwin were on different intellectual tracks. Once Gregor Mendel is placed back into the intellectual landscape that he would himself recognize, its clear that he would always seen The Origin of Species [sic] as a challenge to his own worldview. For his part, Darwin was also being guided by long-since outdated forms of scientific thought. His lifelong commitment to theories of blending heredity would always have precluded his taking Mendels results seriously. Seldom can two important scientific thinkers have written at such hopelessly crossed purposes, says science historian John Waller in a recent book, Fabulous Science. (Emphasis added.)Blending heredity refers to an outdated view that the maternal and paternal lines blended like a fluid to produce a unique offspring. Darwins critics pointed out that, If inheritance was a matter of blending, however, every variant would effectively be blended out in just a generation or two. Mendels discoveries showed that traits, even if recessive and hidden in the phenotype, remained distinct. A recently-found letter from Darwin to Wallace shows that he was considering non-blending ideas of heredity, even though he is mostly remembered for his now-discredited theory of pangenesis, a semi-Lamarckian view that acquired traits from all over the body worked their way via pangenes into the gametes. Williams points out that the story of Darwin having an unopened copy of Mendels paper on his shelves appears to be an urban legend. Apparently the two never crossed paths in person or in correspondence. All we can ask, therefore, is what if? 1Nigel Williams, Speaking Volumes, Current Biology Vol 13, R789-R790, 14 October 2003. The Darwinian Revolution was well on its way before Mendels seminal paper on dominant and recessive traits in garden peas was discovered by neo-Darwinists, even though the monk of Brno had sent copies to leading scientists of his day. Mendel believed his experimental work argued for the persistence of traits. Being Catholic, he almost certainly opposed the Darwinian belief that all organisms had descended with modification from simpler ancestors.Two Faces on Cloning 10/14/2003 Human cloning: a resounding No! Therapeutic cloning: why not? That is the opinion of many scientific institutions, says Nigel Williams in Current Biology 10/14/2003.1 More than 60 of the worlds leading science academies have called for a UN ban on the reproductive cloning of humans, to prevent the exploitation of vulnerable people. But they also urged that any such ban should not extend to cloning human tissue for the treatment of diseases.Cloning of animals is known to lead to malformed individuals, spontaneous abortions, fetal disorders and often death. For thes |