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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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The average adult has about 21 square feet of skin.