Smiling is the best way to face any problem, to crush every fear and to hide every pain.
Happiness is a mental or emotional state of well-being which can be defined by positive or pleasant emotions ranging from contentment to intense joy. The word has different meanings for different people. For many, the sense of happiness derived from a luxurious vacation, or a new dress may seem short-lived, but what if it was possible to extend the joy?
Researchers from the University of Minnesota and Texas A&M University decided to explore whether...
