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Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Your heart beats over 36 million times a year.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.