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 ...

Our facial muscles have evolved to become a remarkable channel of communication. We use our faces to convey a wide range of emotions and attitudes. Although we typically associate smiles with ...

Smiles are often classified as "real," which are automatic and elicited by positive emotions, and "fake," which are formed purposefully, usually as a polite gesture. Though these types of smiles are ...

Our grins are not as simple as they seem. There are a myriad different ways to smile – and some of them can conceal some less than happy feelings. As they hovered over their victims, knives at the ...

This image shows from left to right the reward smile, affiliative smile and dominance smile. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert ...