Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is crucial for numerous bodily functions. But how to increase deep sleep isn’t ...

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 Image: DepositPhotos Get the ...

Jellyfish sleep around eight hours a night, take short daytime naps, and compensate for lost rest,all without having a brain.

We’ve all been there — dragging ourselves out of bed feeling like we’ve been hit by a truck despite getting a full night’s sleep. The alarm blares, and you wonder how eight hours of rest could ...

With daylight saving time fast approaching, our sleep cycles are about to get thrown for a loop. But don’t panic — you don’t have to rely on pharmaceutical sleep aids that leave you groggy or tired.

Ever woken up multiple times at night, groggy and frustrated, just to rush to the bathroom? You might blame your bladder, or ...

Ever wonder why some mornings you wake up ready to go, and others you feel like a zombie? The difference often comes down to when you wake up during your sleep cycle, and that’s exactly what a sleep ...

Forbes contributors publish independent expert analyses and insights. I'm a science journalist specializing in healthy aging and longevity. As we age, we often experience changes in our sleeping ...