@CNN: Koko, the gorilla who mastered sign language, died in her sleep at age 46, The Gorilla Foundation says. She was said to have understood some 2,000 words of spoken English. https://t.co/x2DxErIzLL https://t.co/KFzKwSPciA

June 23, 2018 / The Arbiter / CNN

@CNN: Koko, the gorilla who mastered sign language, died in her sleep at age 46, The Gorilla Foundation says. She was said to have understood some 2,000 words of spoken English. https://t.co/x2DxErIzLL https://t.co/KFzKwSPciA

Koko, the gorilla who mastered sign language, died in her sleep at age 46, The Gorilla Foundation says. She was said to have understood some 2,000 words of spoken English. https://t.co/x2DxErIzLL pic.twitter.com/KFzKwSPciA

— CNN (@CNN) June 23, 2018

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