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

Can you really function on just a few hours of sleep? As Japan’s Sanae Takaichi’s claim sparks global debate, Firstpost ...

Sleep is more than a sweet escape or rare reward to enjoy when you're lucky. Sufficient sleep is vital to nearly every facet of overall health. While sleep still remains a relatively mysterious ...

Few experiences rival the calm satisfaction of falling asleep easily and waking up feeling fully rested. But sleep is more than a luxury or idle downtime, it's a vital biological process that supports ...

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 ...

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, ...

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 ...

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?