As part of a full night’s rest, we cycle through four stages of sleep several times. This includes three stages of non-REM ...

Scientists have recently shown that both the quality and the amount of sleep we get may influence our risk of developing Alzheimer's disease.

Deep sleep is often confused with REM sleep, but the two are actually different. Deep sleep is the part of your sleep cycle in which your body recovers from the day. During deep sleep, your body ...

I've been using the Sleep Cycle app for a few months now and I love it. It wakes me in between REM sleep cycles so the alarm isn't as jarring and I feel better rested. Follow BI Video: On Twitter ...