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The horizontal fraction bar was introduced by the Arabs.

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Everyone has one nostril that is larger than the other.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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