Scientists say there may be two different forms of laughter -- authentic laughter and that associated with humor -- and that the two developed millions of years apart during the course of human evolution.
Scientists say there may be two different forms of laughter -- authentic laughter and that associated with humor -- and that the two developed millions of years apart during the course of human evolution.
This entry was published on January 18, 2006 at 11:41 am.
Tags for this entry: science humor evolution biology
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