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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).
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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