From Sinatra to Katy Perry, celebrities have long sung about the power of a smile -- how it picks you up, changes your outlook, and generally makes you feel better. But is it all smoke and mirrors, or ...

Sure, it's grade-A wholesome, but I felt like I was buying a Playboy for the articles when I handed it to the music store cashier. I desperately felt like defending my dignity by saying I wasn't ...

A humanoid robot can predict whether someone will smile a second before they do, and match the smile on its own face. The creators hope the technology could make interactions with robots more lifelike ...