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 ...

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 ...