2. Laughter is Contagious

Brain scans have shown that laughter is catching.

Although a brain scan is far from funny, if there is laughter, the scan shows the brain responds by preparing the facial muscles for the physical reaction of laughter.

And importantly, the more contagious you are to laughter, the better you are at distinguishing between real and forced laughter.

The Difference between Deliberate and Helpless Laughter
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