the.com/mirth
the involuntary proof that being alive is occasionally hilarious.
old rootsFrom Old English myrgth, sibling to merry.
body hijackReal laughter is reflexive, almost impossible to fake convincingly.
contagiousHearing genuine laughter triggers your own brain's mirror response.
survival edgeShared mirth bonds groups faster than almost anything.
rare wordNow mostly survives in the phrase mirthless smile.