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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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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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.