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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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On average, the stomach produces 2 L of hydrochloric acid per day.