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

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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