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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
The average office desk has 400 times more bacteria on it than a toilet.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Your heart beats over 36 million times a year.
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