Your Inner Reptile
Episode 2 | 54m 46s | Video has closed captioning.
A key moment in our evolutionary saga occurred 200 million years ago, when the ferocious reptile-like animals that roamed the Earth were in the process of evolving into shrew-like mammals. But our reptilian ancestors left their mark on many parts of the human body, including our skin, teeth and ears.
Aired: 04/16/14
Expires: 12/31/27
