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Did you know?
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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?
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.