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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.