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Watch for the Recycle logo to find gems from the back issues!
Wet Cave with Fossils Found in Dry Desert 07/31/2008
What a planet we live on. There are still phenomenal discoveries to be made. Imagine hundreds of thousands of fossils and tree branches buried in one of the driest places on earth. What does that suggest?
Visualize an Ethernet in your eyeball. Revisit the
07/27/2006 entry.
Whats SETI Got to Do With It? 07/31/2008
This is an example of the propaganda tactic of transfer or association. The positive vibes you receive by getting to know an interesting person are supposed to transfer over into making you think that SETI is science, not religion. Anybody can play the association game. Mark is a nice guy with a lot of abilities and interests, but his personality does not put SETI in the Science column. Science needs data. SETI will become a science when Mark finds an alien in his viewfinder, on his next dive, or in the rings of Saturn. Good luck.Ethane Lake Found on Titan 07/31/2008 ![]() July 31, 2008 Liquid ethane has been detected in a lake near the south pole of Saturns moon Titan, reported JPL yesterday. This confirms long-held suspicions that ethane, a byproduct of methane disruption by the solar wind, accumulates on the surface of the large atmosphere-shrouded moon. A problem remains why there is so little of it. Pre-Cassini predictions envisioned a global ocean of liquid ethane. Nature1 reported observations by the Cassini Visual and Infrared Mapping Spectrometer (VIMS) of a lake near the south pole that had been discovered previously. The specular signal indicated an extremely smooth surface smoother than any geological process could make. The spectrum of ethane, a hydrocarbon that is liquid at Titans surface temperature, confirmed that ethane is present. Ethane is formed when atmospheric methane, CH4, in its gaseous form, is struck by the solar wind in Titans upper atmosphere. The bombardment strips off a hydrogen atom. The ionized methane molecules, CH3+, quickly combine into ethane, C2H6, which falls to the surface as rain. A stable molecule, ethane should collect continuously on the surface in pools and lakes. The chemical process is irreversible (03/11/2005). Ethane cannot evaporate back up into the atmosphere, nor can it dissociate back into methane. This should lead to the accumulation of liquid ethane on the surface of Titan over time. Calculations prior to Cassinis arrival showed that a global ocean of ethane and liquid methane should have accumulated over 4.5 billion years up to a half-mile deep or more. Pre-arrival radar images from earthbound instruments cast doubt on the presence of a global ocean, but before the Huygens Probe parachuted to the surface (01/15/2005, 01/21/2005), scientists were still hoping for a splash. The probe landed, instead, on a dry lake bed of what appears to be methane-saturated icy sand, with only traces of ethane present. Before Cassini, scientists thought Titan would have global oceans of methane, ethane and other light hydrocarbons, the JPL press release stated. More than 40 close flybys of Titan by Cassini show no such global oceans exist, but hundreds of dark, lake-like features are present. The southern lake, comparable to the Great Lakes in extent, has been named Ontario Lacus Lake Ontario. Science Daily posted a picture of the 150-mile-long lake from orbit. It covers 7,800 square miles, slightly larger than its earthly counterpart. How deep is it? VIMS can only constrain the minimum depth to 3/4 of an inch. It could be much deeper. The presence of a beach around the perimeter, though, suggests that the lake is evaporating. Scientists wonder if the lakes migrate from pole to pole as the seasons change during Saturns 29.4-year orbit. Cassini has detected more and larger lakes in Titans northern latitudes (radar map) than in the south (radar map). The original paper began with the mystery of the missing ethane ocean: Titan was once thought to have global oceans of light hydrocarbons on its surface, but after 40 close flybys of Titan by the Cassini spacecraft, it has become clear that no such oceans exist. The statement included references to five papers from 1982 to 1995 predicting an ocean (see 1983 and 1993 abstracts by Lunine), including two by Carl Sagan (1982, 2002). Francois Roulin, commenting on the paper in the same issue of Nature,2 noted that Titans lakes are probably a liquid ethane–methane mixture together with dissolved nitrogen, as previously proposed for the speculative oceans that turned out to exist only on paper. Jonathan Lunine, who had predicted a global ocean in 1983, told National Geographic News that the lakes do not hold enough ethane to account for what can be produced over the age of the solar system. So we still have a mystery here. See also the 02/15/2008 entry. The lake may contain other organic molecules besides ethane. Hydrocarbons and nitriles such as propane, butane, acetylene and benzene have been detected in Titans atmosphere, as well as high-mass cluster ions. Cosmic rays bombarding the lakes may produce additional exotic molecules. Artwork tries to convey what an observer might see on this dim world with orange sky; here is another. The surface near the Huygens Probe was actually photographed in realistic color in this historic image from the landing site. Photographs of the descent have been put together into a stunning movie available from the Descent Imager website. Titan turned out to be drier than expected. The equatorial regions are awash in dunes reminiscent of the Namib Desert except that the particles are made of ice, probably coated with hydrocarbons manufactured in Titans bizarre chemical laboratory. 1. Brown, Soderblom et al, The identification of liquid ethane in Titan's Ontario Lacus, Nature 454, 607-610 (31 July 2008) | doi:10.1038/nature07100. 2. Francois Roulin, Planetary science: Organic lakes on Titan, Nature 454, 587-589 (31 July 2008) | doi:10.1038/454587a. Here is a science project crying out for some mathematically-minded person to work on. It can be done right at the desk without special equipment just a literature search and a calculator. Figure out how long it would take to get the observed lakes on Titan. Inputs are conservative rates of ethane production in the atmosphere and the most optimistic estimates of lake volume. The result should place a severe upper limit on the age of Titan.Dinosaur Soft Tissue: Fooled by Slime? 07/30/2008 ![]() July 30, 2008 The claim made in 2005 that soft tissues in dinosaur bone had been discovered (see 03/24/2005) has been challenged by new research published in PLoS One.1 Maybe the pliable stuff is just slime. Thomas Kaye from the Burke Museum of Natural History in Seattle with two colleagues were actually hoping to find more soft tissue samples. After analysis, they concluded instead that what they saw in both dinosaur bone, turtle and ammonite fossils is bacterial biofilm that grew in the hollow spaces inside the fossils. This challenges the findings of Mary Schweitzers team who not only claim to have found flexible tissues and remnant blood vessels, but had also sequenced collagen protein in the samples (04/12/2007). Kaye interprets the putative iron-rich blood cell remnants as framboids microscopic mineral spheres. Finding similar structures in an ammonite (squid-like animal with a shell) and turtle indicated to the team that these framboids were too common to be examples of exceptional preservation from the original tissue. Instead, they postulate that bacterial biofilms grew inside and around the original tissue, maintaining the shape of it after it had decayed away. The paper was summarized by Science Daily, PhysOrg and Reuters. According to New Scientist, though, Schweitzer is not convinced. Her studies indicated that the dinosaur collagen resembled that of chicken, and the mammoth collagen resembled that of elephants. Kaye offered no explanation for how that could happen, she said. Other scientists quoted in the article conjectured that the tissues could be composites of both original tissue and biofilm. The Reuters article quotes Kaye as saying, We are not experts in the field. We are not disagreeing with the fact that their instruments detected protein. We are offering an alternative explanation. The original paper offered more evidence that the proteins are from modern bacteria: Bridged trails observed in biofilms indicate that a previously viscous film was populated with swimming bacteria. Carbon dating of the film points to its relatively modern origin. A comparison of infrared spectra of modern biofilms with modern collagen and fossil bone coatings suggests that modern biofilms share a closer molecular make-up than modern collagen to the coatings from fossil bones. Blood cell size iron-oxygen spheres found in the vessels were identified as an oxidized form of formerly pyritic framboids. Our observations appeal to a more conservative explanation for the structures found preserved in fossil bone.The team investigated 15 genera from seven different geological formations, including the Hell Creek formation where the T. rex soft tissue had been found. The tissues in this investigation were compared with modern biofilms grown in the laboratory. Some of them bore branching structures mimicking blood vessels. The procedure, however, is not as simple as just looking at the tissue with a magnifying class. Their methods indicate significant alteration and interpretation: A turtle carapace from the Hell Creek formation was selected for spectroscopy because of its proportionally large chambers in the trabecular bone that allowed scraping the coatings loose. Two milligrams of material was ground with 450 milligrams of potassium bromide (KBr) and pressed into a pellet using 8 tons pressure. Modern biofilms grown on microscope slides in pond water were allowed to desiccate for 7 days and 2.5 milligrams were pressed into a KBr pellet as above. A 2.5 milligram sample of desiccated tendon from a chicken was ground with KBr and pelletized. Spectrums were taken on a Nicolet 510P bench at 1 cm-1 resolution with a minimum of 15 scans. Infrared flux was matched within 5% for all specimens and a clean KBr pellet used for background subtraction between specimens. Excel cross correlation routines were used to determine percentage of similarity for spectrums.The team did apply several cross-checks. Bones from the surface and from burial meters down showed the same effects. Spectra from living and fossilized specimens were compared. They did not find as close a correlation of the tissues with modern collagenonly 37%. In addition, the radiocarbon dates correlated with modern times. How did these biofilms grow to look so much like original soft tissue? Here was their explanation: A biofilm would coat the voids of vascular canals and lacunae, producing an endocast of the structure. Once the bone is dissolved, these biofilm endocasts would closely mimic pliable vascular structures. The results presented here suggest that the tubular structures and osteocytes are formed by this process. The lack of observed cell structure in the transparent tubes is inconsistent with preserved tissues.They further stated that bacteria are known to produce collagen-like proteins. And since biofilms are ubiquitous in nature, existing on almost any water/surface boundary, they could be expected in the cave-like surfaces inside bones. They provide a protective medium against changes in the broader environment from pH levels, toxins, etc., they said. They are viscous, flexible and long lasting through mineralization. Thats how the earlier team was misled, they think: When biofilms coat a substrate, and that substrate is subsequently removed, the biofilm will retain much of the original morphology. This can explain the quantity and similarity of structures found in fossil bone and indicates that these structures are unlikely to be preserved dinosaurian tissues but the product of common bacterial activities. It appears, therefore, that they made a good case for interpreting the soft tissues as modern bacterial slime, not original dinosaurian remnants. Further investigation will be required to answer new questions this interpretation raises along with time for rebuttal from the Schweitzer team. Update:: After our first posting of this story today, National Geographic reported it and said Mary Schweitzer is standing by her claims. She offered four counter-arguments: (1) No biofilms have been reported with branching, hollow tubes such as the ones she found in the T. rex bone; (2) Over time, gravity would have made the films thicker at the bottom, contrary to what her team found; (3) Methane-breathing bacteria have never been reported inside bone; (4) Kayes team failed to address her teams follow-up reports that employed chemical and molecular evidence for soft tissue. Surprisingly, Kaye responded, If they say they got T. rex protein, then were not disagreeing. He just questioned why they got so little of it. A paleontologist at the National Museum of Natural History left it as a draw. Both teams make compelling arguments. I think you do have two very interesting alternative hypotheses, he said. 1. Kaye, Gaugler and Sawlowicz, Dinosaurian Soft Tissues Interpreted as Bacterial Biofilms, Public Library of Science One 3(7): e2808 doi:10.1371/journal.pone.0002808. We agree with Kaye that You have to go where the science leads, and if Schweitzer ever retracts the claim (based on the best evidence and further study) that these represent (at least in part) original soft tissues from the dinosaur, then so be it. Well have to concede the point. However, a number of questions arise from the new interpretation. For one thing, as some observers noted in the New Scientist write-up, the structures could still be a composite of original tissue and biofilm. And why did Schweitzer get a match of collagen in the dinosaur bone with that of chickens, while using the same techniques, got the collagen in mastodon bone to resemble that of elephants? What about Schweitzers discovery of fragile medullary bone in the same dinosaur fossil? (see 11/11/2006).
If humans harness cellular machines, is it intelligent design?
See the 07/20/2007 entry.
Leaf Assumption Challenged: Affects Climate Modeling 07/29/2008
1. Brent R. Helliker and Suzanna L. Richter, Subtropical to boreal convergence of tree-leaf temperatures, Nature 454, 511-514 (24 July 2008) | doi:10.1038/nature07031. 2. F. I. Woodward, Ecology: Forest air conditioning, Nature 454, 422-423 (24 July 2008) | doi:10.1038/454422a. Do you see how unquestioned assumptions become weak links in chains of reasoning on which politicians and societies put their trust? Maybe the modifications to theory required will not be dramatic in this case, but they could be. Scientists had treated oxygen ratios in tree rings as bona fide scientific evidence of past climate conditions. Scenes of scientists measuring isotope ratios to high precision in labs make for impressive visuals in documentaries. The lay public becomes persuaded that scientists have a virtual crystal ball into the past. All the while they were not measuring climate they were measuring local microclimates right at the leaf surfaces, which can be significantly warmer than the air just a meter away. Plants have a thermostat of their own that maintains near-constant temperatures during the growing season. These temperatures are the ones recorded in the wood not the climate conditions. This little whoops discovery should teach us a healthy caution and skepticism about proxy measurements employed matter-of-factly by scientists. We can all learn, furthermore, to question our own assumptions, as reasonable as they may seem to us.History Channel Airs Evolve 07/29/2008 ![]() July 29, 2008 A new 13-part series on the History Channel, called Evolve, begins with an episode on the evolution of the eye. To sell the story, the blurb needed to cast Evolution as an inventor: Evolve seems to be used as a verb here. If dinosaurs evolved eyes, and primates evolved color vision, were they doing it with purposeful intent? Did they know how to commandeer the mutations necessary to give natural selection the raw materials on which to tinker, in order that the required function for survival would emerge? This would certainly not represent the new-Darwinian view. The terminology seems misleading. The series relies heavily on CGI animations. These, however, depend on the imaginations of current-day people not historical records. History used to be defined in terms of written records. Since this subject matter lacks written records, maybe the channel should be renamed the Prehistory Channel. The hour before also contains an animated episode set in prehistory from the series Jurassic Fight Club about a supposed cannibal dinosaur. Perhaps as a bow to those who respect written records, though, is the episode following Evolve. It is entitled Noahs Great Flood from the series Mega Disasters. The film treats the Biblical story as myth, however. It popularizes the theory of Ryan and Pitman that the Noah legend grew up out of a theorized historical megaflood restricted to the Black Sea region (see 04/06/2002). Illustra Media has been a leader in exploring the origin of life and complex organs from the alternative intelligent design perspective. Readers familiar with Unlocking the Mystery of Life and The Privileged Planet may not be aware that they have also produced films about history for which there are written records: about Jesus Christ and the Exodus. Their titles have just been gathered into one website at ApologeticsDVDs.com. Speaking of history on an unrelated topic, space program buffs will get a thrill out of finding the most comprehensive compilation ever of NASAs vast collection of photographs, historic film and video at NASAimages.org. The collaborative website between Internet Archive and NASA was launched July 24. Evolution thrives on visual propaganda and the power of suggestion. Animation fills in the holes in their story. Dont be fooled. Carl Sagan weaved animation tricks decades ago in the Cosmos TV series. In one of the most egregious cases of visual propaganda for evolution ever shown, his animators depicted a single cell morphing into one animal after the other, till the final output was upright-walking man. The number of conceptual, evidential and philosophical obstacles he leaped over in a single bound makes Evel Knievel look like a pogo-stick rider. OK, Carl, if you want to play the Imagination game, even Homer Simpson can do a better job evolving than that. And Guinness Beer at least got the direction of evolution right.Gems and Hot Ideas About Lifes Origin 07/28/2008 ![]() July 28, 2008 It seems that origin-of-life speculations are constantly looking for new plot lines. PhysOrg published a new idea that life started on diamonds. Yes, Diamonds may have been lifes best friend on primordial Earth, it began, raising the interesting question whether friendship was a concept before consciousness emerged. Since diamonds are thought to be among the oldest minerals on earth, some German researchers studied whether their surfaces would make good incubators for the birth of the first cell. In a series of laboratory experiments, the scientists showed that after treatment with hydrogen, natural diamond forms crystalline layers of water on its surface, essential for the development of life, and involved in electrical conductivity. How does one say necessary and sufficient conditions in German? When primitive molecules landed on the surface of these hydrogenated diamonds in the atmosphere of early Earth, the resulting reaction may have been sufficient enough to generate more complex organic molecules that eventually gave rise to life, researchers say. In another odd scenario, the BBC News suggested that life came from Venus. If it is so difficult as to challenge the best astrobiologists on earth to imagine life forming on a congenial planet in the habitable zone, how much more from a scorching-hot, sultry cooker with a sulfuric-acid-drenched atmosphere? The Wickramasinghe brothers (Chandra being long-time colleague of the late Fred Hoyle) dont look at Venus that way. They think Venuss clouds contain chemicals that are consistent with the presence of micro organisms. And so how did those Venus microbes arrive here on earth? They were blown here by the solar wind. A skeptical researcher considered this not really very likely. How do wild ideas get such good press? If you need a refresher course on why crystals are not templates for information, read the 02/19/2004, 02/15/2004, and 06/08/2007 entries. Progress will be measured in some future day by the decibel level of laughter such conjectures evoke among thinking people.
Backup systems in the cell challenge evolutionary ideas, from
07/21/2006.
Can Worms Outsmart Humans? 07/27/2008
Maybe dogs learned calculus from worms (05/20/2003). If an evolutionist tries to call this a case of convergent evolution, debate him. Its funny to watch them squirm and bark when challenged.Lick Your Wounds 07/27/2008 ![]() July 27, 2008 Saliva contains a powerful anti-infection protein, say scientists from the Netherlands. Science Daily reported that if this compound could be mass-produced, it offers hope for those with diseases, burns and injuries prone to infection. Saliva is a complex concoction with many kinds of molecules. With controlled experiments, the researchers were able to identify histatin as the effective ingredient in promoting healing of wounds. The editor of the journal in which the results were published explained the significance of this finding. This study not only answers the biological question of why animals lick their wounds, it also explains why wounds in the mouth, like those of a tooth extraction, heal much faster than comparable wounds of the skin and bone, he said. It also directs us to begin looking at saliva as a source for new drugs. A search on histatin revealed a paper in 2001 published in Infection and Immunity that also attributed antifungal and antibacterial properties to histatin-5, one of a family of polypeptides produced in the parotid and submaxillary glands. Like other salivary proteins, histatin 5 appears to be multifunctional, they said. If you have been grossed out by the sight of an animal licking an open sore, maybe you should respect the animal for having tacit knowledge that scientists are just discovering. How would evolution explain this? How many animals had to die of infection before the right compounds emerged by chance? How did the animal learn to lick the wound once the antiseptic did emerge?Dinosaurs Placed in Big Tree 07/26/2008 ![]() July 26, 2008 Dinosaurs didnt take advantage of the big rise in diversity at the end of the Cretaceous, say British researchers. Their big supertree of dinosaur evolution shows that the dinosaurs were just evolving at a regular speed while flowering plants, social insects, birds and mammals were evolving like crazy. Science Daily and New Scientist were among popular media reports that printed the supertree diagram and stated the claim without question. An examination of the original paper,1 however, shows something interesting: In order to obtain a well-resolved tree, we undertook some post hoc taxon pruning where poorly constrained species, producing unacceptably high numbers (more than 5000) of equally probable supertrees, were removed. Choosing a tree for diversity analyses was based on overall supertree support.In fact, numerous subjective decisions were made to come up with the supertree. The authors had to decide which fossils qualified as distinct species, for instance. They also ran various tree-building software programs and had to decide threshold values for agreement: e.g., To enforce MIX to run a compatibility analysis, the threshold parsimony option was set to 2. One hundred heuristic searches were performed, and characters were weighted (as described above) using a specifically generated weight file. Subsequent paragraphs show even more subjectivity. Here is one selection from the Materials and Methods section, to give a taste of the tweaking behind the result. Some definitions of terms were added in brackets. Phylogenetic shifts in diversification were detected using SYMMETREE v. 1.0 (Chan & Moore 2005). Analyses of tree shape are biased when a group is paraphyletic [composed of some but not all members descending from a common ancestor], as a particularly speciose clade (in this case, birds) is represented by a single terminal (Archaeopteryx). A modification was thus required in order to account for the absence of birds. Although it was not feasible in the present contribution to include all birds, a hand-drawn phylogeny of the better-known Mesozoic taxa (72 species in total) was inserted at the node subtending Archaeopteryx +Jinfengopteryx, effectively making the tree a Mesozoic time slice. (This placement of Jinfengopteryx is based on the original description (Ji et al. 2005), but more recent analyses, e.g. Turner et al. (2007), have placed it within Troodontidae.) Polytomies [divisions into three or more parts] were treated as soft, with the size-sensitive ERM [equal-rates Markov] algorithm set to perform 10000 random resolutions per individual node and 1000000 random resolutions for the entire tree. Internal branches within the phylogeny on which diversification shifts are inferred to have occurred were identified using the Delta-2 shift statistic. This process was repeated for time slices of the whole tree as described in Ruta et al. (2007) to avoid violating the ERM model.The tree was also fitted to the geological time scale, which assumes the very evolutionary story that the researchers were trying to discern. Then, they added missing data (a kind of oxymoron), or ghost ranges, to get a smoother result: Ghost ranges, minimal basal stratigraphic range extensions implied by the geometry of the phylogenetic tree, indicate missing fossil data, and allow us to correct diversity profiles for the group through the Mesozoic and to compare diversification rates, the proportional change in observed species richness as a function of time, at different points (figure 2b, solid line): note how the addition of ghost ranges smoothes the curve. In particular, peaks in observed diversification rate in the Norian and Campanian-Maastrichtian (bins 3 and 12) are greatly reduced when ghost ranges are introduced. This is a minimal correction that does not take account of unknown taxon ranges before the first appearance of the older of a pair of sister groups. In addition, this correction does not address possible upward range extensions. However, peaks in the earliest, Middle and Late Jurassic are still observed after introduction of ghost ranges (figure 2b, dashed line).Did anyone ask whether selective judgments in software settings and subjective decisions about which species to include and exclude would generate reliable inferences about an unobservable past assumed to be over 100 million years ago? Could this kind of tweaking be guaranteed, instead, to reproduce the authors own biases? The authors did try to correct for some known biases, such as sampling error. They also discussed uncertainties that are hotly debated among evolutionists, such as whether diversification typically occurs early in a radiation or not. The fossil record of continental vertebrates is clearly patchy, with large temporal gaps between sampling horizons. The seriousness of sampling bias is debated, they also granted. Even so, they had to admit, It follows that the fluctuations in diversification rate may not necessarily reflect evolutionary signal, and these must be tested rigorously. When all was said and done, after repeated rounds of tuning the knobs, the signal that dinosaurs did not take part in the alleged Cretaceous Terrestrial Revolution was weak. The popular science articles, though, reported it as a discovery of science. 1. Lloyd, Davis, Pisani et al, Dinosaurs and the Cretaceous Terrestrial Revolution, Royal Society Proceedings B, 0962-8452 (Paper) 1471-2954 (Online), DOI: 10.1098/rspb.2008.0715. You have just watched professional divination in action. What these scientists did has no more relation to the true history of the world than the tea leaves in a fortune-tellers bowl reveal about the origin of tea plants. This is pure hocus, foisted on a gullible public under the guise of science (i.e., knowledge). We provided detailed quotes from the paper to reveal how the trickery is done. You dont have to understand the jargon. Just look at how subjective it is. Why do the popular media publish the bottom-line claims of these wizards as if knowledge has just been gleaned from the world? This is nothing but Darwinist imagination masquerading as scientific research.
Poultry excuses for evolutionary change, and we mean poultry, not paltry, because
they are mere chicken feed: read why in the 07/25/2005
entry. And could anyone today really suggest that anti-Semitism is an example of
natural selection in action? National Geographic did: see
07/19/2005.
Did Lyell Lie a Little? 07/25/2008
Worlds Before Adam looks at how the ideas generated by Cuvier and others came together with more theoretical concepts between 1820 and 1845.Lyell was a man of faith but one who rejected the Mosaic chronology of Genesis. He believed strongly that geological science should be free to investigate the history of the world apart from the framework of a recent creation and world-wide Flood that a straightforward reading of Genesis indicated. Though a dozen or so Scriptural geologists in the late 18th and early 19th centuries defended that view, some of them with equal academic credentials and more field experience, Lyell and his band of academics had little time or interest in hearing them. They were on a program: to advocate a uniformitarian approach to interpretation. If contemporary lists of the greatest scientists feature a geologist at all, it is usually Lyell, a central figure in Worlds Before Adam. Lyell intended the title of his great multi-volume opus Principles of Geology (first published in 1830–1833) to recall Isaac Newtons Principia. He sought to recast geology on firm foundations, just as Newton had done for physics. Following his geologist contemporaries and predecessors, Lyell used the understanding of present-day causes to interpret the deep past a principle termed actualism. Rudwick explains that Lyells excellent descriptions of current geological processes, embellished with observations from his own geological excursions, derived from an original listing by the eighteenth-century German scholar Karl Ernst Adolf von Hoff. Lyell greatly extended the actualistic method by making pronouncements about how the complex geological processes of the past occurred through the progressive action of small-scale procedures that were still in operation, and by prescribing how geologists should reason about these past processes.So even though Lyell appealed to evidence, the force of his influence was in prescribing how geologists should reason about and interpret what they were seeing. Surprisingly, his view faced strong opposition at the time and only gradually became dominant. It was comparable, Baker said, to the influence of Darwin on biology. Darwin had not proved gradual evolution or common descent, either, but had prescribed how biologists should reason and interpret the evidence through a lens of slow and gradual change. In this, of course, he had been strongly influenced as a young man by Lyells own vision. Principles of Geology was among his favorite readings aboard the Beagle. Its interesting why Lyell initially faced opposition. Notice the contrast between facts and reasoning about the facts: Rudwick shows that Lyells ideas met with almost universal criticism. This was not caused by his advocacy of actualism, which was widely used, nor was any serious denunciation forthcoming from the biblical literalists, who were considered anti-scientific by Lyell and by his critics. Instead, the geological facts themselves seemed contrary to Lyells vision of uniform action by small-scale processes operating over a long time. Examples include evidence for sudden mass extinctions from records in various bone caves, the existence of huge blocks sitting erratically out of geological place in the Alps and northern Europe, and deep U-shaped valleys containing streams too small to account for their excavation. Lyells critics held that one should inquire into nature through evidence, rather than through privileged reasoning.This excerpt from Bakers book review underscores two notable points about the history of geology. First, the biblical literalists (a term of derision still in use today by Darwinists) were dismissed not on the basis of the strength of their arguments or evidence, but because they were considered anti-scientific i.e., they were marginalized by categorizing them out of science (a strategy still in use today by Darwinists). Second, Lyells own contemporaries fought against the principle of applying privileged reasoning and argued for inquiry into nature based on evidence. Apparently many of them felt at the time that Lyell failed to respect the evidence when it militated against his world view. The term actualism gave way to uniformitarianism through the nomenclature of William Whewell, a distinguished philosopher of science (see June 2007 Scientist of the Month), who sought to clarify the debate in a way that would discredit Lyells scientific method. It is an irony of subsequent developments in geology, and a testimony to the success of Lyells advocacy, that catastrophism came to be regarded as unconventional. This perverted Whewells original intention, which was to show that the uniformitarians and Lyell were extreme in thinking that geologists should say in advance how nature works, through slow and uniform processes, before interpreting the evidence.As an example, Baker (reviewing Rudwick) points out that Lyell stuck to his guns even when the evidence was against him. When Louis Agassiz (perhaps the greatest of the catastrophists) presented evidence in favor of glacial theory, Lyell resisted, remaining true to his epistemological project. Strictly speaking, an epistemological project is an agenda. It says, I am going to advocate for a different definition of knowledge before going and looking at the evidence. That might be what Baker was referring to in his title, Geological history turned upside down. The influence of Lyell pervaded the field of geology from about 1830 till the 1980s, when individual neo-catastrophists sought a place at the table. One of the most colorful case studies is that of J Harlan Bretz who argued for the catastrophic creation of the Channeled Scablands of eastern Washington by means of a giant flood. His story is told by a new NOVA program airing this week called Mystery of the Megaflood. Information on the PBS website about this program reveals that this is a story as much about the nature of science as about a geological event. It recalls how Bretz had trouble getting his fellow geologists to see data that contradicted their uniformitarian paradigm. Since Bretzs interpretation required phenomena for which there was no present example, such as powerful underwater vortices (kolks) capable of ripping racetrack-size potholes out of solid rock, they ridiculed his ideas for decades (see PBS article interviewing Vic Baker). Bretz defied the uniformitarian consensus and was eventually vindicated (03/05/2008 commentary). It is now more in vogue to offer catastrophist explanations for things (see 05/22/2003).3 Lyells ghost, however, has not been exorcised; it continues making frequent apparitions in the geological literature and popular media. 1. Victor R. Baker, Geological history turned upside down, Nature 454, 406-407 (24 July 2008) | doi:10.1038/454406b. 2. Lyell portrayed his predecessor James Hutton (1726-1797) as the father of uniformitarian geology. This was largely a historical myth propounded by John Playfair, Huttons protègè, and by Lyell, who had propaganda needs for an English giant on whose shoulders to build his ideas. Relying heavily on Rudwicks 2005 book Bursting the Limits of Time, John Reed, writing in the latest Journal of Creation (22:2, 2008), explodes five myths about Hutton: (1) that he was the father of uniformitarian geology (those ideas were common in the 18th century), (2) that Hutton was an empiricist, (3) that Hutton was an objective thinker (he was in fact building a deistic system), (4) that Hutton was a secular martyr (neither religious people nor his fellow savants opposed him), and (5) that Playfair merely clarified Huttons hard-to-understand writing style (he actually cut-and-pasted sections to sanitize Huttons true beliefs). 3. Uniformitarianism does not work for Venus, planetologists confess: see 11/26/2003 and 08/16/2004. As Terry Mortenson documents in his detailed treatise on the Scriptural geologists, The Great Turning Point, the uniformitarian view was an agenda-driven worldview choice, not a requirement of the evidence. Many of the Scriptural geologists were at least as qualified (if not more so) than the long-age advocates who wanted to compromise Christianity with the ancient-earth ideas of Hutton. Lyell himself stated clearly in his letters that his agenda was to divorce geological inquiry from any and all consideration of the Mosaic record in Genesis. He succeeded uniformly with catastrophic results for free inquiry. A perusal of the abstracts from Geology any given month reveals Lyells paradigm nearly unchallenged. Article after article is consumed with fitting this or that formation into its presumed place in the billions-of-years geological timescale. The categories, names and dates are never questioned. Out-of-the-box thinking plays second fiddle to keeping the story going.What Can Science Really Know? 07/24/2008 ![]() July 24, 2008 Two book reviews on philosophy of science appeared in the leading general-science journals Nature and Science last week. Both of them downplayed the oft-told triumphalist portrayal of science as a progressive path toward infallible knowledge the picture most students get in school. In Nature,1 N. David Mermin (Cornell) gave a surprising reprimand to an icon of triumphalist science: Alan Sokal (see 06/03/2008 commentary). Sokals famous hoax against the postmodern deconstructionists in 1996 embarrassed them soundly and signalled the approaching end of the Science Wars of the 1990s.2 Sokal emerged as a champion of scientific realism. His bold trick made him a darling of the scientific establishment. The hoaxs value as a victory for scientific claims to epistemic superiority is debatable, though. Some viewed it more as a boyish taunt than a serious conflict over ideas. Among them is the reviewer of Sokals new collection of essays, Beyond the Hoax: Science, Philosophy, and Culture (Oxford, 2008). Mermin, a physicist and colleague of Sokal, did not have much good to say about this book. He considered Sokals treatment of critics of the triumphalist spirit of science as ill-informed, dismissive and shallow. He found much to agree on, But Sokals unwillingness to expand his frame of reference to accommodate legitimately different points of view undermines his effectiveness as a scourge of genuine rubbish, he concluded. I would like to think that we are not only beyond Sokals hoax, but beyond the science wars themselves. This book might be a small step backwards. In Science,3 Kim Sterelny (philosophy program, Australian National University and Victoria University of Wellington) reviewed William C. Wimsatts essay compendium, Re-Engineering Philosophy for Limited Beings: Piecewise Approximations to Reality (Harvard, 2007). Wimsatt, whom Sterelny considers among the most creative, original, and empirically informed philosophers of our day, dealt with the problem of finite humans trying to form idealized conceptions of natural phenomena that are too complex to grasp in their entirety. These idealizations are heuristic devices. Scientists believe by faith they can be refined with further research and become better approximations to reality. In turn, higher-order complex phenomena can then be reduced in terms of their simpler components: i.e., biology reduces to chemistry, which reduces to physics. Scientific explanation becomes organized into hierarchical domains of increasing complexity. So much for the triumphal picture: It is common ground between Wimsatt and his targets that these ideas about science are idealizations, perhaps even extreme ones. But Wimsatt argues that they are unhelpful idealizations. For they idealize away from what we most need to explain: the cognitive success of limited beings. Treating science as ideally rational is like a developmental biologist using preformationism to model development: the subject matter of the discipline has been idealized away.Wimsatt respects the success of science but understands that causes and effects are not simple. There exists a causal thicket because elements at one level are not always influenced by adjacent levels. If you understand the chemistry of the atomic bonds in DNA, for instance, how much do you really understand DNA translation? The world is messy. We are fallible and bounded. Yet science progresses with great reliability. Wimsatts conception of science is organized around these three facts. Like science itself, his account is partial and incomplete, an approximation organized around the idea of a heuristic. Many questions are left open, and much could be challenged.Perhaps one question that arises immediately is how a messy, heuristic approach to epistemology could yield reliable knowledge. In a new lecture series on the solar system,4 professor Frank Summers (Southwest Research Institute) stated openly that concordance with reality is not important in science. If a theory has good explanatory power and makes good predictions, thats what matters. With that in mind, he had surprisingly good things to say about Ptolemys earth-centered model of the solar system. It explained complex motions in terms of simple geometrical shapes, and helped its users make predictions to sufficient accuracy for 1500 years hardly an achievement to sneeze it, whether or not the model corresponded to the way things really are. 1. N. David Mermin, Science wars revisited, Nature 454, 276-277 (17 July 2008) | doi:10.1038/454276a. 2. The Sokal Hoax episode is discussed at length in a lecture series by the Teaching Company, Science Wars: What Scientists Know and How They Know It by Steven L Goldman, Lehigh University. 3. Kim Sterelny, Philosophy of Science: Addressing Complexity, Science, 18 July 2008: Vol. 321. no. 5887, p. 344, DOI: 10.1126/science.1156895. 4. Frank Summers, New Frontiers: Modern Perspectives on Our Solar System, The Teaching Company, 2008. As these book reviews show, its overdue to dispense with the triumphalist, progressivist view of science. None of these factors guarantee science has a grip on truth: (1) it gets a lot of money, (2) a lot of smart people practice it, (3), it appears to be successful, (4) the textbooks portray it as victorious over superstition, (5) it wins Nobel Prizes, (6) it has a scientific method (whatever that is), (7) geeks major in it at school, (8) its hard and uses a lot of math, (9) it explains things, (10) it uses a peer review system, (11) it has big organizations and publishes impressive journals, or (12) it owns lots of big buildings and museums.Tree of Life in the Genes? Not Yet 07/23/2008 ![]() July 23, 2008 Now that we have hundreds of animal genomes in the bank (the GenBank), is Darwins tree of life becoming visible? If the image is present, it is extremely weak, said Michael J. Sanderson of the Department of Ecology and Evolutionary Biology at University of Arizona. Writing for Science,1 he showed that only a small fraction of genomes show even minimal support for a phylogenetic (evolutionary) tree. His report was accompanied by a circle diagram with 876 taxonomic orders represented by small rectangles along the rim. He shaded blue those that contained a minimal phylogenetic signal, and yellow those that did not. The entire circle was almost all yellow. One has to look hard for blue rectangles. This is after improvements in algorithms and high-performance computing technology have dramatically increased the scale of feasible phylogenetic inference; and unconventional sources of data, including whole genomes, expressed sequence tag libraries, and barcode sequences, have altered the landscape of large-scale phylogenetics with an infusion of new evidence. The distribution of species in GenBank (the database of gene sequences) is remarkably broad, he said. If there was ever a time to see Darwins tree of life come to light in the genes, it should be now. In light of the flood of evidence, how can the phylogenetic signal be so weak? Construction of a high-resolution phylogenetic tree containing all eukaryotic species in the database is a grand challenge that is substantially more tractable than inferring the entire tree of life, but to succeed, strategies will have to overcome serious sampling impediments, he said. Quantifying the distribution and strength of phylogenetic evidence currently in the database is a prerequisite for this effort. So thats what he set out to do. And thats what turned out to look pretty weak. Sanderson looked at 1127 higher taxa for evidence of a phylogenetic signal. He had to set his standards pretty low. He figured if there were at least four operational taxonomic units [OTUs] that were similar between two taxa, for instance, then an evolutionary relationship could be inferred. His choice of tree-building software also was rigged to produce a fast but conservative result. Any clade in the resulting tree will have had at least 50% bootstrap support in maximum parsimony fast bootstrap analyses with two different sequence alignment algorithms, he explained.2 Although this protocol biases the confidence assessment slightly downward, the bias is small. Is that a matter of human opinion? There were more hints the standards were loose. For comparative purposes and to aid in the visualization of results, an arbitrary cutoff value of 1.5 was selected as minimal phylogenetic support, he continued. This is equivalent, for example, to the information content of two independent loci, each resolving three-quarters of clades to at least a bootstrap value of 51%. This sounds close to the tipping point for inferring no relationship at all. After manipulating his protocols, summing, and averaging, the evolutionary signal came out surprisingly low, even with the loose standards. Here is the upshot: Among individual OTUs [operational taxonomic units], Homo sapiens had the maximum support value of 293.9, but the distribution of scores had a long tail leading to 6402 OTUs with no support at all (most of which, 6079, simply were not found in any phylogenetically informative clusters). The top 10 were all mammals; the top 25 were mammals, angiosperms (tomato, potato, tobacco, rice, and wheat), Drosophila melanogaster, and Drosophila simulans, all with support scores above 60 units. Of the 171,703 OTUs for which scores were calculated, only 12% achieved minimal phylogenetic support. The mean support was 0.84, less than the equivalent of each taxon being found in at least one well-resolved and -supported phylogenetic tree.So only 12% reached the already-low bar for evolutionary signal that means 88% did not. At the level of orders, the scores were skewed even lower. The maximum score was 10 in primates, and 0.0 in 75 other orders. He tried to draw an inference between orders that were species-rich and species poor, but many of the orders outside of primates and arthropods did not even reach minimal phylogenetic support regardless of species richness. So what did Sanderson conclude from his investigation of the strength of the signal of Darwins tree of life in the genes? Basically, he said more work is needed. An accurate high-resolution phylogeny will require substantial increases in sequence data to bring that score to a level comparable to that of the best-supported higher taxa. He thinks more data targeted at the right clusters of genes might help. Better algorithms in the tree-building software might help, too. Maybe the signal will become clearer when genes from undiscovered species in poorly-resolved branches become available. In the meantime, sampling protocols guided by quantitative assessments of the phylogenetic distribution of data will improve the efficiency of emerging phylogenomic strategies for building the tree of life of known organisms. Translated, this almost sounds like he is claiming that better data-massaging methods might just begin to help develop strategies for beginning to find ways to begin to visualize Darwins tree. In colloquial terms, its going to take a lot of work to fix this picture. 1. Michael J. Sanderson, Phylogenetic Signal in the Eukaryotic Tree of Life, Science, 4 July 2008: Vol. 321. no. 5885, pp. 121-123, DOI: 10.1126/science.1154449. 2. For more on the meanings of bootstrap, maximum parsimony and other phylogenetic tree-building terms, see the entries from 04/26/2008, 01/26/2008, 03/30/2004, 10/15/2003, and 11/06/2002. Charlies hanging from his own tree. Why give him more rope? It will only make the carcass horizontal instead of vertical.
Visualize spaghetti in a basketball. Now read the 07/24/2004 amazing entry.
In fact, there were a lot of good entries that month, like You have motorized sunscreens
in your eyeballs, 07/19/2004.
Browse the whole page while youre there.
Mangrove as Metaphor 07/22/2008
1. Tal Dagan, Yael Artzy-Randrup, and William Martin, Modular networks and cumulative impact of lateral transfer in prokaryote genome evolution, Proceedings of the National Academy of Sciences USA, published online before print July 16, 2008, doi: 10.1073/pnas.0800679105. Science has moved forward, all right. It has moved so far forward since Darwins time, his speculative worldview of design without a designer has been thoroughly scrambled. A Gordian knot is not the illustration Darwin projected about how life changes. Look at Zimmers last diagram. It requires faith to see any tree at all. Why even maintain the metaphor? Zimmers own reasoning has falsified the original tree diagram and made it superfluous.Earth from Space Is a Special Place 07/21/2008 ![]() July 21, 2008 The Deep Impact spacecraft, 31 million miles away, captured images of the moon circling the Earth, reported Space.com (for the sequence of images, click here). Making a video of Earth from so far away helps the search for other life-bearing planets in the universe by giving insights into how a distant, Earth-like alien world would appear to us, commented Michael AHearn (U of Maryland), principal investigator for the mission. Deep Impact made history by crashing a probe into a comet in 2005. It is now en route to another comet rendezvous in 2010, and searching for earth-like planets around other stars in the meantime. In another story on Space.com, Clara Moskowitz reported that solar systems like ours may be rare. A study of stars in the Orion Nebula only found 10% with enough material orbiting to form Jupiter-size planets. The number of stars able to host planetary systems may be as low as 6%. Surveys like this are subject to statistical interpretation and new data, of course, but the consensus seems to be at this point that without a Jupiter-size planet in the system, it would be unlikely an earth-like planet could survive. See also the 07/13/2008 entry for a list of conditions that make Earth appear unique. Nobody knows at this time whether other earth-like planets exist. NASA missions are continuing to refine methods to detect them. Till then, as far as we know, only our Earth has the conditions that allow silly people to act insanely happy (see Astronomy Picture of the Day). Watch the two videos in order. They communicate to the heart. Where else in the universe could conditions exist for such behavior? What impassionate physical laws brought about the happy dance? Think and then thank (Acts 14:17). The Creator has not left himself without witness, Paul said. Turn away from worthless things. The Creator has given us blessings that fill our hearts with joy in order that we would seek Him, though He is not far from each one of us (Acts 17).Adult Stem Cells May Cure Muscular Dystrophy 07/19/2008 ![]() July 19, 2008 Muscular dystrophy leaves children and adults in a nearly helpless state. Parents watch in agony as their children suffer rapid and progressive weakness. Attempts to support research, like the annual Labor Day events Jerry Lewis has held for over 40 years, have betrayed their inability to find a cure by the very fact of their continuance. Now, there is a new possibility that the solution may not lie in some exotic drug or invention of man, but in cells that live right inside our bodies: adult stem cells. The BBC News reported hopeful results from a study at Harvard that showed Transplanting adult stem cells into mice with an illness like muscular dystrophy (MD) helped rebuild muscle structure and strength. It took awhile to identify the correct cells, but Once the stem cells were in place, they spread throughout the muscle, producing new cells and improved the way it worked. It appears they also produce a stem-cell reservoir for long-term benefit. Moreover, the cells were not rejected (in mice) when injected from a donor. Before human treatments can begin, of course, much further study will be required. Problems of distributing the cells to every affected tissue in the body will need to be solved. The lead researcher said, however, that This study indicates the presence of renewing muscle stem cells in adult skeletal muscle, and demonstrates the potential benefit of stem cell therapy for the treatment of muscle degenerative diseases such as muscular dystrophy. In other adult stem cell news, Science Daily reported that dentists may be able to use your own bone stem cells to repair teeth. Orthodontic work might be accomplished in months instead of years. Another report on the BBC News said that immune cells cloned from your own skin might cure melanoma and other forms of skin cancer. Yet another report on Science Daily said that scientists are finding ways to reprogram stem cells in place in the body without having to manipulate them in the lab. This can even be done with your own neural cells inside your brain reprogramming them in their natural environment. All these advances are occurring without the need for embryonic stem cells. Praise God for progress on all debilitating diseases regardless of how scientists find them, but this one has special significance for those who have been watching the debate over embryonic stem cells. It illustrates the disconnect between the researchers actually finding cures and the scientific establishments who keep pushing embryonic stem cells (ELS cells), which require the killing of fertilized human embryos. Adult stem cells cause no ethical concerns.
Damage control: another potentially falsifying piece of evidence against evolution
was analyzed in the 07/16/2003 entry.
Evolutionists cant connect natural selection to the fact that every animal
develops from a single-celled embryo. Moreover, the genes that control this
development are astonishingly conserved across the animal kingdom!
Watch how they tried to wiggle out of that straitjacket.
Cellular Trucks Use Moving Highways 07/18/2008
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