You walk over to your friend who is asleep on your couch, snoring away. You bend over to goose him when suddenly you jump back in shock. His eyes are open. Wide open ...

Have you heard the saying about “sleeping with one eye open”? It’s a bit of metaphoric advice about staying vigilant—and a way to describe very light restless sleep. But sleeping with eyes open is ...

A study conducted on several individuals found that when a person has gone without sleep for a long period, their brain ...