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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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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.