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The average office desk has 400 times more bacteria on it than a toilet.
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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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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.