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Your Inner Fish | Clip | How Do We Know When Our Ancestors Lost Their Tails?

Unlike most other primates, apes don't have a tail. When did our ancestors lose this potentially useful appendage? Paleoanthropologist Holly Dunsworth introduces Neil Shubin to Proconsul, a fossil ape that provides some answers to that question.

S1 E3 | 0:04:00 | AIRED: 4/9/2014 |
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