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Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
Did you know?
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Did you know?
People about to have surgery must tell their health care providers about all supplements they take.