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The average adult has about 21 square feet of skin.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.