Woese Slays Darwin 01/28/2010 Jan 28, 2010 — The king is dead! Long live the king! Such were the oxymoronic cries of olden times when royal succession took place. Has Charles Darwin been dethroned? One would think so, after reading Mark Buchanan¡¯s article, ¡°Horizontal and vertical: the evolution of evolution¡± inNew Scientist. Buchanan sets the stage:
Just suppose that Darwin¡¯s ideas were only a part of the story of evolution. Suppose thata process he never wrote about, and never even imagined, has beencontrolling the evolution of life throughout most of the Earth¡¯s history. It maysound preposterous, but this isexactly whatmicrobiologist Carl Woese and physicist Nigel Goldenfeld, both at the University of Illinois at Urbana-Champaign,believe. Darwin¡¯s explanation of evolution, they argue, even in its sophisticated modern form, applies only to a recent phase of life on Earth.
Woese and Goldenfeld championhorizontal gene transferas the overriding process that led to the genetic code and established biology as we know it. The Darwinian part is like a footnote, acting on the last episodes of biological history. Subsequent quotes show even more how far and deep this coup goes:
Earth for most of the time that life has existed –billions of years, in fact – themost ancient and prevalent form of evolution probably wasn¡¯t Darwinian at all, Woese and Goldenfeld say.
¡°Biologybuilt up a facadeof mathematics around the juxtaposition of Mendelian genetics with Darwinism,¡± he [Woese] says. ¡°And as a result itneglected to study the most important problem in science – the nature of the evolutionary process.¡±
This isall very different from evolution as described by Darwin.
Darwinian evolution simply cannot explainhow such a [genetic] code couldarise.
¡°With vertical,Darwinian evolution,¡± says Goldenfeld, ¡°we found thatthe code evolution gets stuckanddoes not find the true optimum.¡±
¡°In some sense,¡± says Woese, ¡°the genetic code is a fossil or perhaps an echo of the origin of life, just as the cosmic microwave background is a sort of echo of the big bang. Andits form points to a process very different from today¡¯s Darwinian evolution.¡±
Today, at least in multicellular organisms, Darwinian evolution is dominant but we may still be in for some surprises. ¡°Most of life – the microbial world – is stillstrongly taking advantage of horizontal gene transfer, but we also know, from studies in the past year, thatmulticellular organisms do this too,¡± says Goldenfeld.
If a paradigm shift is pending, [Norman] Pace [U of Colorado] says it will be in good hands. ¡°I thinkWoese has done more for biology writ large than any biologist in history,including Darwin,¡± he says. ¡°There¡¯s a lot more to learn, and he¡¯s been interpreting the emerging story brilliantly.¡±
Will this be a Kuhn-style paradigm shift of epic proportions as these excerpts make it seem? If so, will the Darwin Bicentennial be the last hurrah of a dying paradigm? Will future scientists be celebrating the Woese Bicentennial some day? Any replacement paradigm in a scientific revolution needs to explain anomalies better than the old paradigm. On page 2 of the article, Buchanan writes, ¡°Darwinian evolution simply cannot explain how such a [genetic] code could arise. But horizontal gene transfer can, say Woese and Goldenfeld.¡± There¡¯s the gauntlet. OK, how? First, they point to the universality of the code. Then, they point to its degeneracy – the fact that multiple codons in DNA can translate to the same protein in amino acids, giving the code redundancy, and thus, some tolerance to mutation. Third, they point to the remarkable error tolerance of the code:
In 1991, geneticists David Haig and Lawrence Hurst at the University of Oxford went further, showing thatthe code¡¯s level of error tolerance is truly remarkable. They studied the error tolerance of an enormous number of hypothetical genetic codes, all built from the same base pairs but with codons associated randomly with amino acids. They found thatthe actual code is around one in a million in terms of how good it is at error mitigation. ¡°Theactual genetic code,¡± says Goldenfeld, ¡°stands out like a sore thumb as being the best possible.¡± That wouldseem to demand some evolutionary explanation. Yet, until now, no one has found one. The reason, say Woese and Goldenfeld, is that everyone has been thinking in terms ofthe wrong kind of evolution.
So far, it sounds like they have discovered evidence for intelligent design. It¡¯s not like followers of the Darwinian paradigm were ignorant of these properties, even if they thought little about them. Woese has challenged them to explain the emergence of an optimal code by Darwinian means, and claims they can¡¯t. So what is his new explanation in terms of another naturalistic, evolutionary processes? Here is the key paragraph:
Goldenfeld admits thatpinning down the details of that early process remains a difficult task. However thesimulations suggestthat horizontal gene transferallowed lifein generalto acquire a unified genetic machinery, therebymaking the sharing of innovations easier. Hence, the researchers now suspect that early evolution may have proceeded througha series of stagesbefore the Darwinian formemerged, with the first stage leading tothe emergence of a universal genetic code. ¡°It would have acted as aninnovation-sharing protocol,¡± says Goldenfeld, ¡°greatlyenhancing the ability of organismstoshare genetic innovationsthat werebeneficial.¡± Following this, a second stage of evolution would have involved rampant horizontal gene transfer, made possible by theshared genetic machinery, and leading to arapid, exponential rise in the complexity of organisms. This, in turn, would eventually have given way to a third stage of evolution in whichgenetic transfer became mostly vertical,perhapsbecause thecomplexity of organisms reached a threshold requiringa morecircumscribedflow of genesto preserve correct function. Woese can¡¯t put a date on when the transition to Darwinian evolution happened, but he suspects it occurred at different times in each of the three main branches of the tree of life, with bacteria likely to have changed first.
In sum, horizontal gene transfermade the sharing of innovations easier. But where did the innovations come from? The answer: emergence: ¡°theemergence of a universal genetic code¡± that just happened to be optimal. Don¡¯t ask how; just believe. After all, believing the Darwinian alternative is no longer credible, so what else is there?
If you are reading this explanation in utter disbelief, good. There¡¯s hope for you. Surprised? Not if you have been readingCreation-Evolution Headlinesfor long. This is another in a long series of articles on evolutionary theory,from within the secular, naturalist camp, that might be titled, ¡°Everything you know about Darwinian evolution is wrong, and our only replacement for it is to tell you that miraculous Stuff Happens sometimes.¡± Example:01/22/2009: For His Birthday, Darwin Loses His Tree. You may be thinking that Woese¡¯s conquest only applies to microbes. King Charles gets to keep all his multicellular icons (finches, horses, whales, humans) which evolved under his reign, so he still maintains a large territory. Consider, though, that the article quoted Jan Sapp [York U, Canada] saying, ¡°The microbial world holds the greatest biomass on Earth, but for most evolutionists it¡¯s a case of ¡®out of sight, out of mind¡¯. They tend to focus on visible plants and animals.¡± Consider, secondly, that horizontal gene transfer essentially scrambles genetic signals between species and makes the construction of phylogenetic trees impossible. Consider, finally, that invoking theemergencemiracle-word at the beginning of life effectively pulls the rug out from any credible naturalistic explanation of life at all. Adding ¡°then a miracle happens¡± to a derivation undermines the whole derivation. We shouldn¡¯t see Woese as a conqueror, therefore, but as a traitor, selling out the Darwin Party¡¯s dirty little secrets to the Intelligent Design conquerors. He has revealed their basal vulnerability: they cannot account for the origin of the genetic code. That is, without miracles. Read that last blockquote and count the miracle words likeemerged, arose, innovation-sharing protocol, etc. They¡¯re pervasive. It should be obvious now that everyone believes in miracles: i.e., instances where information became intruded into nature that was not subject itself to nature running its own undirected course. The intelligent design conquerors are very open and transparent about this. The Darwinists deceive themselves and their listeners by couching their miracles in euphemisms likeit emerged, it arose, it evolved, without a clue as to how that could happen without a mind. So pay them no mind; let their bankruptcy become self-evident.