Add Yahoo as a preferred source to see more of our stories on Google. Sixty years ago, scientists embarked on an experiment to teach American Sign Language to chimpanzees—and ultimately prove humans ...

Tired of ads? Subscribers enjoy a distraction-free reading experience. Click here to subscribe today or Login. Washoe, who had a vocabulary of 250 words, dies in Washington at age 72. Washoe is shown ...

How can one teach language to a chimpanzee who is unable to produce the basic sounds of spoken language (phonemes)? Extensive research has shown they can’t. Two approaches, each using a visual ...

Humans are known to invent private hand gestures. Chimps in the wild do, too, a new study suggests. By Brandon Keim Parents and their children, or people who know each other well, often share some ...