When people smile politely, flash a grin of recognition, or tighten their lips in disapproval, the movement is tiny – but the message can be huge. Imagine you are in a courtroom observing a juror who ...

Photo-Illustration by Chloe Dowling for TIME (Source Images: Klaus Vedfelt—Getty Images, Tim Robberts—Getty Images, Kelvin Murray—Getty Images, Robert Recker—Getty Images, Howard Kingsnorth—Getty ...

Do you find it difficult to choose the perfect smiley-face emoji when trying to convey happy emotions in a text message? Although many emojis look very similar, it seems there are countless slightly ...

Facial expressions play a fundamental role in social communication. While it is well established that others’ expressions influence our behavior—such as approaching a smiling person or avoiding an ...

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 ...