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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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The average office desk has 400 times more bacteria on it than a toilet.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.