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Description: Laughter is universal, but we know very little about the reasons we do it. Dr. Robert Provine has been studying the social and neurological roots of laughter for 20 years, and has come to surprising conclusions about how we operate as human beings.nnFor more on the health benefits of laughter, visit: http://theatlantic.com/magazine/archive/2014/06/funny-or-die/361618nnTo learn more about Dr. Provine's research, read his latest book, Curious Behavior: http://bit.ly/UrvbpT
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