When Koko's death was announced, many news organisations, including the BBC, wrote headlines such as "Koko: Gorilla who mastered sign language" and "Koko, famed gorilla that learned sign language".

Koko the gorilla, who is said to have been able to communicate by using more than 1,000 hand signs, has died in California at the age of 46. Instructors taught her a version of American Sign ...

Despite warnings that a 37-year-old ape might die if transferred to an Ohio zoo, a federal judge said Thursday he can only settle matters of law, not what's best for the well-being of the late Koko ...

Documentary telling the extraordinary story of Koko, the only 'talking' gorilla in the world ... her claims and the image of Koko mourning the death of her kitten.

Koko the gorilla is world famous for having masters ... distress and concern from watching a sad movie and over the death of a kitten. Howler monkeys are widely considered to be the loudest ...