The average adult has about 21 square feet of skin.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.
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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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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.