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The horizontal fraction bar was introduced by the Arabs.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Illicit drug use costs the United States approximately $181 billion every year.