The Cambrian Explosion

Retiming "The Cambrian Explosion."

Interesting--because this is THE adaptive radiation that is foremost in the minds of scientists when they talk of such things.  However, it is most interesting that within that 20 MY or so all of the major body plans of all of the major phyla (and some body plans of phyla that no longer exist) were present.  There are some mysteries that might well remain mysteries, though one should not cease from trying to understand.

Thanks to the link bank at Julie's Happy Catholic.

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