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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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The average adult has about 21 square feet of skin.
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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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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.