Neuroscientists probing the boundary between sleep and awareness are finding many types of liminal states, which help explain ...

New neuroscience reveals sleep is an active brain process, not just rest. Parts of your brain remain awake during deep sleep, ...

(CNN) — Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Baland Jalal lay in bed terrified, experiencing his own real-life horror ...

Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." - Illustration by Leah Abucayan/Alberto Mier/CNN Baland Jalal lay in bed terrified, ...

Researchers in Oklahoma have discovered that floating alligators keep half their brain awake as they sleep. Karen Parker/FWC photo As if alligators weren’t intimidating enough, experts have discovered ...

You’re gently drifting off to sleep when suddenly your arms and legs convulse and you jolt yourself awake. Or, perhaps you’re relaxing in bed when, out of the blue, your dozing partner does an ...

MINNEAPOLIS — It takes 15 to 20 minutes for most adults to fall asleep. During that period, an odd sensation can occur which about seven out of 10 of us experience: bedtime twitches. Dr. Ranji ...

(CNN) — Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Baland Jalal lay in bed terrified, experiencing his own real-life horror ...

(CNN) — Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. CNN — (CNN) — Sign up for CNN’s Sleep, But Better newsletter series. Our ...