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.Premiere Date: August 2, 2016 | Runtime: 00:54:51
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In 1971, Penny Patterson, a graduate student at Stanford University, met Koko, a new-born gorilla in San Francisco Zoo. Penny had grown up wanting to communicate with animals and decided to teach Koko sign language in the hope of finally crossing the boundary between animals and humans.