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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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If you could remove all of your skin, it would weigh up to 5 pounds.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).