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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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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.