Transcription: The most interesting thing about shark evolution is its length. Sharks are among the most ancient animals, being on a planet about 450 million years. So in that period of time, this group has been winnowed out by evolution to a very small but highly diverse and adaptive group. Now while everybody thinks of the great white shark as the shark, they don't often realize that there are some sharks as flat as a pancake. Others that have noses with saws on the end of them. Others that have fins like a kite, and of course there's the giant whale shark, which is a shark, not a whale, but behaves like a ...
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