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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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If you could remove all of your skin, it would weigh up to 5 pounds.