A smile is just a smile, right? Not so, according to researchers. Psychologists from the U.S. and the U.K. have figured out how to identify different types of smiles to better understand the popular ...

Smiles are one of the most universal forms of communication, and yet, they are far more complex than they appear. While a smile often signals happiness or friendliness, different types of smiles can ...

A smile means that someone is happy—or maybe not. Although we associate smiling with happiness, people can use a smile to convey a whole range of different messages. Research in nonverbal ...