During deep sleep, specifically the slow-wave stage that dominates the first half of the night, your brain activates a waste-clearance system called the glymphatic network. Cerebrospinal fluid pulses ...

Although we know sleep is essential to our physical and mental well-being, it remains an incredibly enigmatic behavior, scientifically speaking. Researchers at the University of Michigan, however, may ...

The Chicago Marathon starts under a yellow flag with a forecast high near 71, above the 65-degree normal. Heat illness signs and when to stop. Records Detail Immediate Jeopardy Citation After ...

The difficulty in falling asleep is only the beginning. When scrolling repeatedly pushes bedtime later, reduced sleep ...

The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced. By Clarissa Brincat Published Sep 9, 2025 9:00 AM EDT Add Popular Science (opens in a new ...

Exercise and naps may protect memory after sleep deprivation in different ways. A doctor explains what these results from a recent study mean.

Nutritional lithium orotate may deepen sleep by supporting melatonin, easing stress, boosting GABA, and improving slow‑wave ...

Modern lifestyles, longer light exposure and constant digital distractions have pushed the world into a global sleep crisis—one that poses a major threat to public health. Sleep loss doesn't just ...

You stayed up too late scrolling through your phone, answering emails or watching just one more episode. The next morning, you feel groggy and irritable. That sugary pastry or greasy breakfast ...