PhysOrg Posted May 7, 2021 Share Posted May 7, 2021 Human laughter is common, but it's a somewhat mysterious part of our evolution. It's clear to evolutionary scholars that we laugh as a part of play, signaling our cooperation or friendliness. But how did laughter evolve? And are humans the only ones who do it?View the full article Quote Link to comment Share on other sites More sharing options...
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