TED
talk of the month: December.

"Ron Gutman"

The hidden power of smiling.

“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 well-being? Prepare to flex a few facial muscles as you learn more about this evolutionarily contagious behavior.

(7 minutes 26 seconds)