Sleep
Latest about Sleep
![During sleep, waves of oxygenated blood (red) and then cerebrospinal fluid (blue) wash over the brain.](https://cdn.mos.cms.futurecdn.net/dCVrvVFiZV3JmqwtYQQcCE-320-80.gif)
Watch Spinal Fluid 'Wash' the Sleeping Brain in Rhythmic, Pulsing Waves
By Stephanie Pappas published
A new video shows the rhythmic sloshing of cerebrospinal fluid in the human brain during sleep.
![sleeping woman](https://cdn.mos.cms.futurecdn.net/r8aviC8uhw4VW67DmxsqzL-320-80.jpg)
Girl with Rare 'Sleeping Beauty' Syndrome Dozes for Months
By Nicoletta Lanese published
A rare syndrome leaves a teenage girl bedridden from excessive sleepiness.
![Woman running in the early morning.](https://cdn.mos.cms.futurecdn.net/fQjjTkDCnEk3AJfLYtZvtg-320-80.jpg)
Why Do Some People Need Less Sleep Than Others?
By Karen Weintraub published
New genetic research in mice may reveal why some people need less sleep than others.
![Anyone up for a cup of chamomile tea and flowers?](https://cdn.mos.cms.futurecdn.net/Fi4jRrhVKLFzZSkgdqbbKF-320-80.jpg)
Does drinking chamomile tea really help people fall asleep?
By Grant Currin published
Does drinking chamomile tea actually make people sleepy?
![A yawning person](https://cdn.mos.cms.futurecdn.net/6uENy7JjWZAkYZdbPoY4qd-320-80.jpg)
Night Owls and Morning Larks, Make Room for 'Afternoon People' and 'Nappers'
By Yasemin Saplakoglu published
If you're not a morning person or a night person, but more like a midday person, don't feel left out.
![A man paralyzed during sleep.](https://cdn.mos.cms.futurecdn.net/4UrtrRA9xJzwNhCPycBKyQ-320-80.jpg)
Sleep Paralysis: Causes, Symptoms & Treatment
By Nicoletta Lanese published
Sleep paralysis can be a confusing, frightening and occasionally pleasant experience — and it's more common than you might think!
![Woman sleeping](https://cdn.mos.cms.futurecdn.net/kxEGPDhVpF2xzR7vqXpFT4-320-80.jpg)
Can You Learn Anything While You Sleep?
By Bahar Gholipour published
Sleep learning, the way people commonly think of it, is almost certainly impossible. But researchers are discovering types of learning that occur during sleep, with exciting applications.
![A woman working on her computer at night.](https://cdn.mos.cms.futurecdn.net/QEGYdfkEZzYjYg8eZ8yx44-320-80.jpg)
Life Really Is Harder for Night Owls. Here's Why.
By Rachael Rettner published
"Night owls" have different patterns of brain activity compared with "morning larks," a new study finds
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