Koko the gorilla, famous for learning how to speak using sign language with her human trainer, has died at the age of 46. The rest of this article is behind a paywall. Please sign in or subscribe to ...

Koko, Kanzi and Panbanisha are about as famous as three apes can get. Born in 1980 and 1985 respectively, Kanzi and his half-sister Panbanisha became primate mega-stars when these bonobos picked up ...