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 ...

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 ...