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Politics : Evolution
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To: Brumar89 who wrote (54513)5/13/2014 10:30:40 PM
From: 2MAR$  Read Replies (1) of 69300
 
It might be an interesting summer project to compare Erwin & Valentine side-by-side with Stephen Meyer. Well, “interesting” in a Bambi Meets Godzilla sort of amusing sense.

But if you want to know what caused the Cambrian explosion, I can give you the short answer. Not intelligent design; that doesn’t even make sense. What it was was environmental changes, in particular the bioturbation revolution caused by the evolution of worms that released buried nutrients, and the steadily increasing oxygen content of the atmosphere that allowed those nutrients to fuel growth; ecological competition, or a kind of arms race, that gave a distinct selective advantage to novelties that allowed species to occupy new niches; and the evolution of developmental mechanisms that enabled multicellular organisms to generate new morphotypes readily. Read the real books if you want to know more, and ignore the uninformed babble the charlatans of the of the Discovery Institute will try to sell you.

And of course the "Satan Theory" of earth's evolutionary history works for one ecstatic moment in the pew.... but you didn't think there have ever been any great atmorpheric or ocean changes in gas & mineral composition as epoch time swept forth?

Think "arms race" and all becomes illuminated.
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