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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 immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.
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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.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.