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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Everyone has one nostril that is larger than the other.