The hidden power of smiling summary

Ron Gutman reviews some studies about smiling, and reveals some surprising results.  If someone always smile that he can have a longer live -- and a simple smile can lead us to a healthy life.  Smile is not a simple behavior of our human. It has          hidden benefits behind smiling. Smile more everyone that can lead u have a better life and warm impression to other people. 

The hidden power of smiling

My topic us Ron Gutman: The hidden power of smiling
and here is the URL: http://www.ted.com/talks/lang/eng/ron_gutman_the_hidden_power_of_smiling.html