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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
Did you know?
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Did you know?
The FDA recognizes 118 routes of administration.