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The average office desk has 400 times more bacteria on it than a toilet.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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There are 20 feet of blood vessels in each square inch of human skin.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.