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health advisory Hospital Doctor Yu 2007-11-8 19:08:06

Answers:

They're working on it. :-)

What they do know:

"The results [of a recent study] turned up [that] . it bypasses the known brain circuitry for consciously analyzing and mimicking other people鈥檚 actions."

"This might be part of a more general phenomenon of unconscious signals that serve to synchronize group behavior, the authors of the Neuroimage paper wrote. 鈥淪uch synchronization could be essential for species survival and works without action understanding, like when a flock of birds rises to the air as soon as the first bird does so鈥攕upposably as it notices a predator.鈥?quot;

Try the article in the sources for more.

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no one knows.

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supposedly .

when you yawn you take in a lot of air.

others around are in a way deprived of oxygen and the body makes em yawn..

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I say this show and they did an experiment to see why that happens. they did not find out but go to the following link you can find out http://www.madsci.org/posts/archives/aug.

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