Love, pain, joy, fear, desire: the full spectrum of emotion resides in facial expression. We grasp this almost intuitively. However, we still lack a quantifiable understanding of the nuanced ...

When a baby smiles at you, it's almost impossible not to smile back. This spontaneous reaction to a facial expression is part of the back-and-forth that allows us to understand each other's emotions ...

Humans are social beings, hardwired to navigate complex interactions through signals that communicate our internal states. Of all the channels we use to perceive emotion, the human face is arguably ...