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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 longest a person has survived after a heart transplant is 24 years.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.
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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.