I’ll admit that I wasn’t aware there was a unique field of study devoted to understanding the role smiling plays in human physical and mental health. (For a review of smiling research see the recent ...

Everyone knows how to fake a smile. We learn when to show and hide our genuine emotions from early face-to-face exchanges. Parents instinctively want to shield their children from negative social ...

Have you ever seen someone smile or laugh at the wrong moment, especially after hearing bad news, and wondered why it happens? At first glance, it can appear insensitive or confusing, as if the person ...