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Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Did you know?
Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Did you know?
The horizontal fraction bar was introduced by the Arabs.