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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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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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Illicit drug use costs the United States approximately $181 billion every year.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.