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Scientifically speaking...?

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what is laughing...

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  1. healthy? lol

    a particular movement of your diaphragm and the muscles in your chest to expel air and make a noise, just the same as singing or humming except the muscles move in a different fashion


  2. Your ears picking up vibrations from someones mouth. Signals in the brain from nevre cells go off places. They stimulate cells to make you laugh.
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