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Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
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).