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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.