Japanese fishers have found an unusual bottlenose dolphin with an extra set of fins that could be an evolutionary throwback to the time when the marine mammals' ancient ancestors walked on land. The dolphin was captured alive off the southwestern coast of Japan on October 28. It was then shipped to the nearby Taiji Whaling Museum for study. "This is an unprecedented discovery, I believe the fins may be remains from a time when dolphins' ancient ancestors lived on land" says Seiji Osumi of Tokyo's Institute of Cetacean Research said in a weekend press conference. Scott Baker, associate director of the marine mammal program at Oregon State University in Corvallis, agreed, saying that "this certainly is direct evidence of evolution."
I think that its cool how water animals evolved from and. I also think that if the water animals or dolphins evolved from land then mabye before the stone age they were still there and the "cavemen" saw them.
In the picture Japanese fishers found a bottlenose dolphin with four fins instead of two. The extra hind fins (inset) are about the size of human hands and could be proof that the marine mammals first evolved from land animals.
Source: http://news.nationalgeographic.com/
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