Smile And The World Smiles With You

Ron Gutman's fun TED talk pulls together some of the latest research on the power of the 'smile.'

According to the British Dental Foundation Research one smile releases the equivalent endorphins of 2000 chocolate bars or winning a jackpot of £16,000. Not only is it the ultimate in free personal feel-good but it's the most contagious body language a human can express - anywhere in the world.

So if things look grim...grin.