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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.