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If you see two people laughing at a joke you didn’t hear, chances
are you will smile anyway—even if you don’t realize it.
According to a new study, laughter truly is contagious: the brain
responds to the sound of laughter and preps the muscles in the
face to join in the mirth.
“It seems that it’s absolutely true that ‘laugh and the whole world
laughs with you,” said Sophie Scott, a neuroscientist at the
University College London.
“We’ve known for some time that when we are talking to someone,
we often mirror their behavior, copying the words they use and
mimicking their gestures.
Now we’ve shown that the same appears to apply to laughter, too
at least at the level of the brain.”
Originally posted by iori_komei
Some scientists think human ancestors may have laughed in
groups before they could speak and that laughter may have
been a precursor to language.
Originally posted by juicebox
It's funny just imagining that A bunch of cavemen just standing around and laughing.
How about yawning? I think they are also contagious.