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Did you know?
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.