In the 1960s and 70s, a group of chimpanzees astonished the world by learning sign language. Only two remain and one question ...
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 ...
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