Tiny people giggle at everything from tickling to peek-a-boo to silly faces. But do they really have a sense of humor?

The tendency to replay conversations can also come from experiences rooted in early relational environments. This is ...

Human laughter may trace its evolutionary beginnings to vocalizations made during play. This type of "laughing" is found in ...

Women need to know that if they have uncontrollable peals of laughter every time they orgasm (and nothing was funny), they ...

Researchers at the University of Basel have developed a tool that measures when people engage in dialog across political ...

Goosebumps arise when tiny muscles around hair follicles contract, causing the hair to stand on end. Learn what triggers them and when they may be cause for concern.

You've been told to "let it out" your whole life. But venting anger doesn't release it—it rehearses it. Here's what four ...