Ever wonder why some mornings you wake up ready to go, and others you feel like a zombie? The difference often comes down to when you wake up during your sleep cycle, and that’s exactly what a sleep ...

Here’s what you’ll learn when you read this story: We have evolved a sleep cycle that goes from non-REM to REM sleep and back again, but until now, the biological function of this oscillation was ...

We all know that a solid night’s sleep is important. But let’s be honest: Getting enough sleep is easier said than done. In fact, 1 in 3 adults aren’t getting the rest they need, according to the ...