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http://www.guardian.co.uk/science/2009/jun/04/laughter-primates-apes-evolution-tickling

http://www.guardian.co.uk/science/2009/jun/04/laughter-primates-apes-evolution-tickling

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  • G8rrrry
    The first hoots of laughter from an ancient ancestor of humans rippled across the land at least 10 million years ago, according to a study of giggling primates. Researchers used recordings of apes ..
    G8rrrry on 05.06.2009 at 23:45

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