Deep sleep is the mentally and physically restorative stage of sleep. How much of it do you actually need?

It might not be eight hours, despite what you've heard.

Many things go into getting a good night’s rest — including getting enough deep sleep. While “deep” and “quality” sleep might sound interchangeable, deep sleep is actually one of the four sleep stages ...

A few years ago, archaeologists were rummaging about the Border Cave in South Africa’s northeastern province of KwaZulu-Natal ...

Though it might seem like the question "How much sleep do you need" gets a new answer every other week, the The National Sleep Foundation says its new chart breaks the question down like never before.

Sleep outranks diet and exercise as a longevity factor, per new research. Here’s what to know and how to act on it tonight. Leon Bennett Getty Images New research is reframing sleep and life ...

It can be tough to calculate exactly how long you’re in REM, but many health trackers use your heart rate, heart rate variability, and data on your movements to make solid estimations. (Just know that ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Why do I need to sleep for a long time at night?

The middle of the night used to be my special time. I’d use it to cram for a test, read a mystery, or play Candy Crush—with no one around. As I got older, those nighttime hours became time to answer ...

We may have protested nap time when we were kids, but as adults, we know sleep is vital. (Anyone else wish they could have nap time during their day job?) Shakespeare called it the “sore labor’s bath, ...