RAW: STUDY: APES, HUMANS HAVE LAUGHED SIMILARLY FOR 15M YEARS
Scientists say our speech may have evolved from laughter, and great apes were likely laughing in a similar rhythm to modern humans for millions of years.
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While laughing seems uniquely human, it is not. Researchers now have compared laughter in humans to laughter in the various great apes — chimpanzees, bonobos, gorillas and orangutans.
