Chimpanzees Build Beds in Trees for a Comfy Night's Rest (IMAGE)

Duke University

Chimpanzees Build Beds in Trees for a Comfy Night's Rest

Caption

Our closest animal relatives, chimpanzees sleep an average of 11.5 hours a night, whereas humans snooze for just seven hours.

Credit

Photo courtesy of Kathelijne Koops, University of Zurich, Switzerland.

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