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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?
Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
Did you know?
Your heart beats over 36 million times a year.
Did you know?
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.