Smiling could be good for your health. Researchers are finding that wearing a smile brings certain benefits, like slowing down the heart and reducing stress. This may even happen when people aren ...

Study shows when people are put in stressful situations and told to hold a facial position like a smile, they have lower heart rates after recovery period ...

People in the study weren't necessarily in a good mood--they just faked a smile. So skip flipping off the guy who's driving like a jerk, and force a grin instead.