World Science

Hysteria is real, study finds:

Hitherto unexplained cases of partial paralysis or numbness may have a physical cause after all, scientists say.

Why laughter is contagious:

You can catch it without asking for it, or even necessarily wanting it. Now, scientists say they have an idea of why.

Humor beats disease, researchers find:

Scientists are reporting what they call most direct evidence yet that ability to laugh saves lives.

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