Human laughter similar to that of apes, chimps
China Daily | Updated: 2009-06-05 07:54
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A baby orangutan laughs while being tickled, in Sabah, Malaysian Borneo. Scientists say they've traced the origin of laughter into humankind's evolutionary past. AP |
NEW YORK: When scientists set out to trace the roots of human laughter, some chimps and gorillas were just tickled to help. Literally.
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