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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.