How does a sleep tracker on your finger compare to one in a bed? I tested Sleep Number and Oura for a month to find out. Plus ...

A new study shows how math helps explain why babies nap erratically, teens stay up late, and older adults wake earlier.

Many sleep experts also advise cleverly timing melatonin to sleep more healthily in a new time zone. Atwood, for example, ...

Textbooks say that mitochondria exist to supply cells with energy, but experiments in fruit flies suggest they are also ...

New research shows missing just one night of sleep can significantly disrupt your immune system, increasing vulnerability to illness.

Between night sweats and nighttime anxiety, sleeping during menopause is no easy feat. While I'm a couple of decades away, I'm constantly hearing about the sleep disruptions caused by peri ...

Why is light sleep important? REM sleep gets a lot of attention for its contributions to health, but you still need light sleep as part of a healthy sleep cycle.

In A Nutshell Disrupted circadian rhythms from artificial light at night can affect immune function, neuroinflammation, metabolism, sleep, and mood. Dr. Randy Nelson’s lab is testing real-world ...

In the summer, when day waits a very long time before yielding to night, the transition from light to dark can be magical — ...

Getting good quality sleep, where you spend ample time in each essential sleep stage, is equally as important as sleeping for a certain duration every night. 8 things that happen to your body when ...

We turned to sleep experts to find out the ideal schedule to extend your mattress’s life, improve comfort, and support better rest night after night. Meet the Expert ...

‘How I Sleep’ is a series about how people with highly specific sleeping situations fall asleep and stay asleep — and the products they use.