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 ...

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, ...