Science, Creation & EvolutionSudden appearance of phyla in the Cambrian explosionI edited the post to leave the link for the picture, as requested. It's just evidence, like the other whale-like features of the skull. That's why, before they found the rest of the body, they thought it was an ordinary whale. Actually, it did eventually go extinct, and the particular form of the bone really doesn't do much out of the water. It was a random change that was neutral selectively, that happened to be useful in water. Well, as you see, it's a great deal more than that. Not quite, but almost. But keep in mind, no sharks, no mammals, no reptiles, no birds, no trees, no insects... (very long list of things that did not appear until much later than the Cambrian) It isn't. The pace of evolution varies a great deal. When new niches become available, such as occured with the evolution of completely scleretized bodies, there is a rapid adaptive radiation. It's happened since, but never on such a broad scale. Part of evolutionary theory. Doesn't have to be slow. |
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