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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.