/tags/laughter laughter en-US Copyright Wed, 11 Jun 2014 14:59:11 GMT /science/2014-06-11/study-up-for-think-a-look-at-laughter To guffaw, to chuckle, to giggle—laughter, regardless of how we do it, is a form of expression everyone experiences. But why do we do it? Today at 1 p.m.… Wed, 11 Jun 2014 14:59:11 GMT /science/2014-06-11/study-up-for-think-a-look-at-laughter Christina Ulsh