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Everyone has one nostril that is larger than the other.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.