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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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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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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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The average office desk has 400 times more bacteria on it than a toilet.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.