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Newspaper
Cedar Rapids Gazette
Location
Cedar Rapids, Iowa, United States of America
Date
Apr 03, 2005
Page
9
Scientists report that laughter-like sounds in animals are not uniquely human. Chimpanzees produce pants of excitement while dogs have a play cue that reduces stress in kennels. Rats emit cheerful chirps during roughhousing, hinting at shared emotions across mammals and implications for autism and ADHD research.
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