Smiles light up the room when you let one grace your face, but did you know there are different types of smiles? We all have our favorite smile, and we love watching our partner or friends' faces ...

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 ...

The face we present to the world is constantly changing as different combinations of its 42 muscles contract and contort it. Humans can produce thousands of distinct facial expressions – including 19 ...