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Learn about Koko, the gorilla who redrew the line between people and animals for more than 40 years. In 1971, Penny Patterson began teaching sign language to Koko, unaware that this relationship would define both their lives.

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Special
54:51
Koko - The Gorilla Who Talks

Koko - The Gorilla Who Talks

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Clip
3:15
Koko - The Gorilla Who Talks

The Move to Stanford

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Clip
3:05
Koko - The Gorilla Who Talks

Early Days with Koko

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Clip
2:24
Koko - The Gorilla Who Talks

Battle for Koko

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Clip
3:20
Koko - The Gorilla Who Talks

Facing Critics

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Clip
3:02
Koko - The Gorilla Who Talks

Koko's Kitten

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Clip
2:05
Koko - The Gorilla Who Talks

Meet Koko

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Preview
0:30
Koko - The Gorilla Who Talks

Preview

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