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Did you know?
Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Did you know?
Cyanide works by making the human body unable to use oxygen.