mood

Imagine a world where your smartphone can realize that you're angry or sad, and react accordingly. Thanks to the University of Rochester, it's not as far away as you might think.

Adele's music is heartbreaking and beautiful...but also, apparently, sleep-inducing.  That's according to a new survey by British budget hotel chain Travelodge, which found that the Grammy-winning singer's songs are the U.K.'s favorite choice at bedtime, because they help people relax and drift off to sleep...