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Did you know?
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).
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.