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Thursday, October 28, 2010

Photo: Apes Laugh, Tickle Study Finds


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Look like laughter to you? A researcher tickles a young orangutan named Naru for a June 2009 study that concluded that great apes laugh like humans.

The finding suggests that human laughter originated more than ten million years ago in a common ancestor of great apes and humans, the study says.

Photograph by Miriam Wessels/University of Veterinary Medicine, Hannover, Germany