BBC4 年
Chantek, the orangutan who used sign language, dies at 39
Chantek was being treated for progressive heart disease, Zoo Atlanta said An orangutan who was one of the first apes to learn sign language has died in Atlanta, Georgia, aged 39. Chantek lived ...
BBC2 年
Koko: Gorilla who mastered sign language dies in California
has died in California at the age of 46. Instructors taught her a version of American Sign Language and say she used it to convey thoughts and feelings. The abilities of the gorilla, who also ...