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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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.