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 ...

Source: Robert Ingersoll, with permission. I recently learned of a book by Robert Ingersoll and Antonina Anna Scarnà titled Primatology, Ethics, and Trauma: The Oklahoma Chimpanzee Studies, about how ...

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 ...