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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 Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.