Each night, our brains cycle through hours of activity that remain surprisingly mysterious. Even though much of that time is spent dreaming, scientists still don't fully understand what the brain is ...

That sudden jolt or twitch just as you’re drifting into sleep isn’t your imagination. It’s a real physiological event. One moment, you’re fading into slumber, and the next, your arm or leg flings out ...

Neuroscientists studying the shifts between sleep and awareness are finding many liminal states, which could help explain the disorders that can result when sleep transitions go wrong Yasemin ...