TEDTalks : Isabel Behncke: Evolution's gift of play, from bonobo apes to humans - Isabel Behncke Izquierdo (2011)

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With never-before-seen video, primatologist Isabel Behncke Izquierdo (a TED Fellow) shows how bonobo ape society learns from constantly playing -- solo, with friends, even as a prelude to sex. Indeed, play appears to be the bonobos' key to problem-solving and avoiding conflict. If it works for our close cousins, why not for us?