Koko, a western lowland gorilla said to have mastered American Sign Language, has died aged 46, the California institute which studied her said on Thursday. "The Gorilla Foundation is sad to announce ...
Koko, the gorilla who mastered sign language, has died. The Gorilla Foundation says the 46-year-old western lowland gorilla died in its sleep at the foundation's preserve in California's Sana Cruz ...
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