In the mid 19th century, French neurologist Guillaume Duchenne wanted to distinguish real smiles from fake. Interested in the response of nerves and muscles to stimulation, he applied electricity to ...

This simple action can bring joy to others, but recent research at the University of Wisconsin looked into physical reactions to smiles and their multiple uses — not all of which, are an expression of ...

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 ...

A smile, like a picture, is worth a thousand words. Although most commonly associated with happiness, smiles can indicate nervousness, embarrassment and even misery. To add to their mystique and ...

The smile may be the most common and flexible expression, used to reveal some emotions, cover others and manage social interactions that have kept communities secure and organized for millennia. But ...

You’re scanning through a website showing photos of prize winners, and of course all of them are smiling. However, as you look through the array of apparently happy people, some strike you as ...

The smile may be the most common and flexible expression, used to reveal some emotions, cover others and manage social interactions that have kept communities secure and organized for millennia. But ...

A new study has revealed that chimpanzees have the same types of smiles as humans when laughing, which suggests these smile types evolved from positive expressions of ancestral apes. A new study has ...

You’re scanning through a website showing photos of prize winners, and of course all of them are smiling. However, as you look through the array of apparently happy people, some strike you as ...