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Little is known about the health consequences of chronic partial sleep loss -- losing a little bit of sleep over a period of days, months or even years. Now Northwestern University ...

Research suggests that teens are chronically sleep deprived. Caffeine use might be a consequence of that, and also a cause. Drinking coffee could lead to sleep-onset insomnia, or ...

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We've all experienced that occasional all-too-short night of sleep -- staying out too late at a party on a weeknight studying into the wee hours for a morning exam or being kept up ...