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REM vs. Non-REM Sleep: The Stages of Sleep
Scientists once thought that sleep was a time when a person's brain and body shut down for the night. But now, researchers know that sleep is a highly active time.
Why Do We Sleep?
Researchers who study sleep now have a few theories about why we spend one-third of our lives in dreamland.
The Science of Jet Lag: 5 Surprising Findings
Nothing can throw off the start of a fun vacation faster than jet lag.
Sleepiness and Snoring Tougher for Women, Study Suggests
Sleep disorders may affect women more severely than men.
Why Sleep Is So Important for People at Risk for Heart Disease
Not getting enough sleep is linked to an increased risk of dying early, a new study finds.
Trouble Sleeping? Air Pollution Could Be the Culprit
People in a new study who lived in areas with high levels of air pollution slept worse.
Booze snooze: Why does alcohol make you sleepy, then alert?
What's behind this weird effect?
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