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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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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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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.