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 [email protected]. Why do I need to sleep for a long time at night?

Here's how much sleep you really need, based on your age. Sleep is crucial for health; adults generally need 7-9 hours each night for optimal functioning. Sleep requirements vary with age; for ...

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.

We all know the power of a good night’s sleep. You wake up refreshed, energized and ready to take on the day. But what many consider a luxury or an occasional win, should be a nonnegotiable part of ...

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 ...

Daylight saving time ends at 2 a.m. on November 2, giving Americans an extra hour of sleep but earlier sunsets. A study shows sleep duration and bedtime vary by state. Experts say seven to nine hours ...

It’s no secret that we all love our sleep. Time spent resting — whether we allow ourselves the pleasure or not — is crucial for our daily functioning and wellbeing. And while we relish the hour 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 [email protected]. When someone’s asleep, it can look like they are ...