More to a Smile Than Lips and Teeth

by Larry Emmott on January 26, 2011

in General,Just for Fun

Interesting

Psychologists have studied smiles carefully for decades, but mostly from the outside. When the zygomaticus major muscles in our cheeks contract, they draw up the corners of our mouths. But there’s much more to a smile than that.

via More to a Smile Than Lips and Teeth – NYTimes.com.

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