Skip to main content
Report this ad

See also:

Research shows spontaneous cooperation in chimpanzees

The study apparatus required that chimpanzees remove a barrier in order for another chimpanzee to simultaneously pull in a tray baited with food. The apparatus was mounted to the outdoor enclosure, allowing the chimpanzees to come and go as they wanted.
Credit: Yerkes National Primate Research Center Usage Restrictions: None
Report this ad