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Your heart beats over 36 million times a year.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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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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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.