Koko, the gorilla who mastered sign language, died at the age of 46. Koko, the gorilla who mastered sign language and became a pop-culture phenomenon, will be laid to rest Saturday in a ceremony at an ...

A rescue cat using "sign language" when hungry has taken over TikTok. In a clip shared by user @ohcharliecat on January 24, a ginger tabby called Charlie can be seen putting his paws together and ...