Yawning May Promote Social Bonding Even Between Dogs And Humans - NPR

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Yawning May Promote Social Bonding Even Between Dogs And Humans NPR Bears do it; bats do it. So do guinea pigs, dogs and humans. They all yawn. It's a common animal behavior, but one that is something of a mystery. There's still no consensus on the purpose of a yawn, says Robert Provine, professor of psychology and ... and more »

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