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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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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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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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There are 60,000 miles of blood vessels in every adult human.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.