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Koko - The Gorilla Who Talks

In 1971 Penny Patterson began teaching sign language to a gorilla named Koko, unaware that this relationship would define both their lives. Over 40 years on, now internationally famous, Koko continues to redraw the line between people and animals.

0:54:51 | AIRED: 8/2/2016 | EXPIRES: 1/1/2024 |
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