Everything you need to know about REM sleep, including what it is and how much you need ...

REM stands for rapid eye movement — a stage in the sleep cycle when your brain is almost as active as when you’re awake. Getting enough REM sleep is crucial, as it helps you store information and ...

Your brain cycles through several stages during sleep, and REM sleep might be the most critical. This mysterious phase, where dreams unfold and memories solidify, accounts for roughly a quarter of ...

In today’s fast-paced world, sleep is often treated as optional—a luxury we squeeze in between work, social life, and endless scrolling on our phones. Yet, ...

If you use a sleep tracker at night, these are the three metrics you should be paying attention to in the morning.

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Need another reason to prioritize your sleep ...

Scientists have recently shown that both the quality and the amount of sleep we get may influence our risk of developing Alzheimer’s disease. Now, a study suggests that people who take significantly ...

Obstructive sleep apnea, a condition that causes lower oxygen levels during sleep, is linked to degeneration of brain regions associated with memory through damage to the brain's small blood vessels, ...

In a new study from the University of Michigan, researchers have coupled experiments with models of neuronal circuits, like the one shown here, to investigate the role of the non-REM to REM sleep ...