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Did you know?
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.