Koko, the gorilla whose apparent aptitude for sign language endeared her to fans around the world, died in her sleep on Tuesday morning, according to the Gorilla Foundation, which oversaw her care.

Koko, the western lowland gorilla who learned sign language and became a pop-culture phenomenon, died Thursday morning at the age of 46. The Gorilla Foundation, headed by Dr. Francine “Penny” ...

(NEW YORK) — Koko, the gorilla who mastered sign language and became a pop-culture phenomenon, will be laid to rest Saturday in a ceremony at an animal sanctuary in Northern California where she lived ...

WOODSIDE, Calif. (CBSNewYork/AP) — Koko, the gorilla who mastered sign language, has died. The Gorilla Foundation says the 46-year-old western lowland gorilla died in her sleep at the foundation's ...

In several previous experiments, sign language has been taught to chimpanzees, but this is the first real attempt with a ...

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 ...

Koko the gorilla who mastered sign language, raised kittens and once playfully tried on the glasses of the late actor Robin Williams, has died. She was 46. The Gorilla Foundation says the western ...

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 ...

Celebrities bid farewell to the well-known ape. By Ryan Parker Koko, the gorilla who mastered sign language and became something of a pop culture staple, has died, the Gorilla Foundation confirmed.