@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/JoGTFgFXCR https://t.co/Ag4JIXhYZ3

June 21, 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/JoGTFgFXCR https://t.co/Ag4JIXhYZ3

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/JoGTFgFXCR pic.twitter.com/Ag4JIXhYZ3

— CNN (@CNN) June 22, 2018

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