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Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
The horizontal fraction bar was introduced by the Arabs.