Koko the gorilla, known around the world for her skill with sign language, has died. The Gorilla Foundation says the 46-year-old passed away in her sleep at their preserve in California's Santa Cruz ...

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 ...

WOODSIDE, Calif. (KGO) -- The Gorilla Foundation, based out of Woodside, is among those mourning the loss of Robin Williams. The foundation said the actor and Koko the gorilla shared a special bond.

Koko, a western lowland gorilla who became internationally famous for learning to communicate in sign language, has died at the age of 46. The Gorilla Foundation announced Koko’s death, saying she ...

Koko, arguably the world’s most famous gorilla, has died at the age of 46. Known for her ability to communicate through sign language, Koko forever changed our conceptions of primate intelligence and ...