REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

Healthy sleep includes multiple components, such as number of hours of sleep per night, how long it takes to fall asleep, daytime functioning and self-reported sleep satisfaction, and addressing these ...

Sunlight plays a huge role in our energy levels and sleep quality. One study found that those who got enough morning sunlight ...

What if we didn't need sleep to dream? Well, scientists may have found a way to hack those benefits even when you're awake.

On an Apple Watch, "core sleep" is another name for light sleep, which scientists also call stages N1-N2. It is not a type of ...

Hallucinogens like DMT, psilocin, and LSD might rewrite the rules of sleep, blurring the line between dreams and reality.

For more on the nature of sleep, go here.] Scientists believe that dreaming plays a role in the consolidation of memories, ...

If you're on the fence about the best sleep masks, know that there are two types of sleepers in this world: Those who can ...

A study published in the Journal of Clinical Sleep Medicine explores the association between sleep architecture and brain atrophy in regions vulnerable to | Neuroscience ...

A new study from Yale School of Medicine has found that people who spend less time in deep sleep and dream-related sleep may ...

A good night's rest isn't just about waking up refreshed — it plays a critical part in preserving your mental sharpness as you age. The role of sleep quality ...