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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Your heart beats over 36 million times a year.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).