TED talk: Did you know your smile can be a predictor of how long you'll live ?

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. Follow the link : https://www.ted.com/talks/ron_gutman_the_hidden_power_of_smiling