Daylight saving time begins at 2:00 a.m. Sunday—and while you'll only turn the clock ahead one hour, the disruption might be enough to throw you temporarily off kilter.
9 hours ago
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Sufficient sleep is critical for adolescent health, yet the number of hours slept per night has decreased among teenagers in the United States over the last 20 years. A study by researchers at Columbia University's ...
Feb 16, 2015
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