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Study Explains Evolution's Molecular Advance
pnewhook writes "The New York Times is reporting that 'by reconstructing ancient genes from long-extinct animals, scientists have for the first time demonstrated the step-by-step progression of how evolution created a new piece of molecular machinery by reusing and modifying existing parts. The researchers say the findings, published today in the journal Science, offer a counterargument to doubters of evolution who question how a progression of small changes could produce the intricate mechanisms found in living cells.'"
It was only a matter of time before scientists discovered the steps and had enough knowledge to connect the dots.
Frankly, I'm glad they're finding more and more of how biology works. I don't want to get into a creationist debate, but it has always astounded me that people would argue that life is too complex for it to have been made "naturally" and that a higher being must have helped along the way. But, by saying that, they're saying that God is not powerful enough to create such a universe in which evolution can happen, that a universe created by God could not possibly work by itself.
How dare they...
There is nothing without God.
This is a science discussion - proselytizing has no place here.
"We returned the General to El Salvador, or maybe Guatemala, it's difficult to tell from 10,000 feet"
It's worth noting that most mathematicians already think ideas like Irreducible Complexity and Complex Specified Information are a load of hooey, despite the appeals people like Dembski and Behe make to having made innovative breakthroughs in these areas:
b -at-dembski-vacuousness.html
- irreducible-complexity.html
w een-ic-and-it-arguments.html
One good blog on this subject I've found is Good Math, Bad Math, and some posts relevant to this topic are:
-CSI is basically incoherent: if you translate the definition of CSI into non-obscure words, it essentially boils down to either "something that contains a lot of information, but doesn't contain a lot of information" or a definition for which EVERY piece of information is specified:
http://goodmath.blogspot.com/2006/04/one-last-sta
-IC, when translated into math, makes no sense. We can actually PROVE in math that there is no general proof that some system is the simplest possible (which IC requires), much like we can prove that we can never solve the halting problem.
http://goodmath.blogspot.com/2006/03/problem-with
-Even if they did make sense, CSI and IC basically conflict with each other, arguing contradictory things:
http://goodmath.blogspot.com/2006/03/conflict-bet
The reason the NYT is giving this the "doubters of evolution" spin is that there's this guy, Michael Behe, who wrote a book around 1995 somewhere called "Darwin's Black Box". The central idea of that book was the allegation that evolutionary science treats the cell like a "black box" that nobody attempts to look inside or explain. Evolutionary science, said Behe, only concerns itself with larger structures, and only assumes the stuff inside the cell "just works". Because evolution can't explain, subcellular structures, evolution lacks a foundation, is built on nothing, and is wrong.
This is, of course, silly if you're actually familiar with the science, because to whatever extent scienists ever treated the cell like a "black box", it was because we didn't know how to look inside yet. Viewing machinery the size of a molecule is really hard. Scientists could analyze things, but have only relatively recently gained the ability to view the full picture of things, much as they might have wanted to.
Once the technology for understanding the molecular structures that make up cells really started to take off (say, at the beginning of the 80s-ish), a revolution of sorts started in microbiology and genetics. And as this happened, Behe managed to exploit a neat trick of timing; he wrote his book just as a lot of fascinating questions were appearing through this revolution in microbiology, but before (since the questions had only just been asked) we really knew what the answers were. Behe was able to craft the illusion, since we didn't know the answers to some of those questions yet, that the questions didn't have answers or would never be answered and thus evolution was flawed-- not mentioning that work was underway or even partially completed to find answers to all of these questions. In the time since Behe wrote his book, cell microbiology has progressed by leaps and bounds, but the book itself is able to do a neat little job of making it seem like the cell really is just an inexplicable black box, because he wrote it just as science totally finished picking the lock.
Which brings us to this story: The one scientific "big idea" in Darwin's Black Box was what Behe calls "Irreducible Complexity", and the publication of Darwin's Black Box was the main way this idea was popularized. The idea behind irreducible complexity is that there exist structures that contain one or more parts, and that if you remove one of the parts, the entire thing stops working. But one would expect that evolutionary mutation can only change "one thing" at a time; the idea that a single new allele that could simultaneously create two separable and interlocking structures seems wholly unbelievable. So how did irreducibly complex structures evolve?
This is an extremely reasonable question, and one evolutionary science is obligated to answer. The problem is that Behe, and the rest of the ID crowd:
The answer to how irreducibly complex structures could evolve is pretty simple: all that would have to happen is for a structure to change its purpose over time. That is to say, it doesn't matter that irreducibly complex structures can only evolve one part at a time, because it is simple to imagine each of the small structures in an irreducibly complex system independently evolving for some other purpose than the big IC system performs, then being adapted into a bigger IC system with rube goldberg style ingenuity, then gradually losing the ability to function for their original purpose indepen
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