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, the ...

You can fake a handshake. You can fake a pitch. You can't fake a real smile. I'm not talking about the "smile for the camera" look or the awkward half-smirk you throw your neighbor while grabbing the ...

Online communities can inspire incredible moments — but magic truly happens when people come together in real life. That energy was on full display at the Wonderland Wishes Offline Charity Event, a ...

It can be awfully cute when babies smile in their sleep—but is it a real smile, or just a reflex? We turned to experts to learn more. Among all of your baby’s first milestones, smiling is arguably one ...

Smiles are strange things. People use them when they are happy, yes, but also when they are uncomfortable, bored, anxious, or trying to be polite. Sometimes a smile has nothing to do with joy at all.

Everybody everywhere smiles. Across all cultures, people smile. In fact, smiling may be an evolutionary throwback to the silent bared-teeth display of nonhuman primates. Although babies start smiling ...