Can we infer someone's cultural group from their laugher, even when we do not know what they are laughing at? And what kind of laughter do we find most positive? A new study shows that our laughter ...

Yesterday, someone said something that had the whole group of people I was with absolutely belly-laughing. Once the guy got started, he kept going, improvising something somehow funnier with each ...

She has been warned that it might be hard to make this particular group laugh - that these individuals typically don't even smile much. That it's a pretty serious group. But "Mrs. Giggles," also known ...