Watch Koko the Gorilla Use Sign Language in This 1981 Film

Published 26 Jun 2018, 17:07 BST
Watch Koko the Gorilla Use Sign Language in This 1981 Film
Watch Koko the Gorilla Use Sign Language in This 1981 Film

This is Koko the signing gorilla. Koko died in her sleep on Tuesday, June 19, 2018. Here is a clip from a 1981 National Geographic documentary.

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