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Author Question: Natalia arrives at a birthday party and her schema for how one behaves during birthday celebrations ... (Read 142 times) |
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).
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.