"You key there me cookie." With that sign language, Koko the gorilla tells her mentor; 28-year old graduate student Penny Patterson, to get the key, open the closet and get a goodie out of the cookie ...

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” ...

Add Yahoo as a preferred source to see more of our stories on Google. Celebrity gorilla Koko died in her sleep this week at age 46, the Gorilla Foundation announced today. Koko, a western lowland ...

Add Yahoo as a preferred source to see more of our stories on Google. Koko, the gorilla who mastered sign language and appeared on Mister Rogers Neighborhood and numerous documentaries, died Tuesday ...

Humans around the world are mourning the death of 46-year-old Koko, the western lowland gorilla who could communicate using a variant of American Sign Language optimized for the anatomy of a gorilla’s ...

Sad news from the animal world today: Koko the gorilla has died at the age of 46, reports the non-profit organization the Gorilla Foundation. Born on July 4, 1971 at the San Francisco Zoo, Koko — ...

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.

For the last four decades, Koko, the world’s most famous gorilla, has lived in a trailer in Silicon Valley, the subject of the longest-running project on ape sign language. With a reported vocabulary ...

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 ...

SAN FRANCISCO - Koko the gorilla, whose remarkable sign-language ability and motherly attachment to pet cats helped change the world's views about the intelligence of animals and their capacity for ...