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Everyone has one nostril that is larger than the other.
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The human body produces and destroys 15 million blood cells every second.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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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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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.