The Hidden Power of Smiling - Fascinating!
This fascinating short lecture by Ron Gutman explains a series of studies about smiling - with some very surprising results. For example, did you know that your smile might indicate how long you will live?
http://www.youtube.com/watch?v=U9cGdRNMdQQ (http://www.youtube.com/watch?v=U9cGdRNMdQQ)