The rhythmic patterns of laughter found in apes and humans reveal that complex primate vocal control might have started evolving 15 million years ago. Tickling a chimpanzee, a gorilla and a human child causes similar rhythms of laughter, according to an analysis of primate behaviour. Laughter is a conserved vocalization in humans and their closest primate relatives. A study published in Communicati... [2020 chars]
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