Quote:
Originally Posted by jimjamuser
There is one animal species that scientists have no prior evolutionary links for. At least it was that way when I asked my Anthropology Professor about it 40 yeas ago (so things may have changed. The animal "dolphin" suddenly appeared some? number or thousand years ago. They suddenly appeared in the anthropological records for some unknown reason. I have never since seen a discussion or explanation about that. But, then again, I was never curious enough to look into the subject further.
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Anthropology has absolutely nothing to say about dolphin evolution. It is the study of human society, what make us human. Dolphins did not suddenly appear except that obviously there was a time before dolphins [when a now extinct precursor species lived] and a time after their speciation. The first "dolphins" appear in the fossil record over ten million years ago.
Google provides a myriad of available resources to learn about how land based mammals with hands and feet with five digits returned to the ocean as warm blooded sea inhabitants. The skeletal architecture of dolphins still has the same general bones as we do in our arms and hands... common ancestors, proof of evolution from an earlier progenitor.