You’ve probably heard the claim that it takes more muscles to frown than to smile. It’s usually framed as a feel-good reason to turn your frown upside down – less effort, more joy. But anatomically, ...

Fake smiles do not necessarily indicate dishonesty. They also might be used in most instances as a coping mechanism. Since ...

Many smiles are socially motivated, used to appear polite, reduce tension, or mask discomfort. Scientists have long studied how the human brain distinguishes between real and fake smiles, revealing ...