YouTube doesn't want you know this subscribers secret
The hidden power of smiling | Ron Gutman
http://www.ted.com Ron Gutman reviews a raft of studies about smiling, and reveals some surprising results. Did you know your smile can be a predictor of how long you'll live and that a simple smile has a measurable effect on your overall wellbeing? Prepare to flex a few facial muscles as you learn more about this evolutionarily contagious behavior.
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