SUSAN KUKLIN / SCIENCE PHOTO LIBRARY SUSAN KUKLIN / SCIENCE PHOTO LIBRARY
Joyce Butler with Nim Chimpsky the chimpanzee (Pan troglodytes), named after American linguist, philosopher, cognitive scientist, and political activist Noam Chomsky. Student teacher Joyce Butler of Columbia University and the famous chimpanzee Nim are grooming each other. Photographed during project Nim, an extended study of animal language acquisition conducted in the 1970s.
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