By tracking eye movements in zebrafish, researchers identified four different types of sleep, analogous to the complex sleep ...

My bedroom has become a sleep lab filled with smart rings, fitness bands, and mattress covers. Here's what I learned.

N early half of all Americans and around 40% of Britons now use a smartwatch, smart ring, phone app or another similar device to track their sleep. Are these gadgets accurate—an ...

Long-haul travelers often feel totally out of whack for several days after arriving at their destination. Jet lag is a ...

This simple mental exercise is meant to distract an overactive brain just enough to help you drift off. I tried it on my own ...