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Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
Thyroid conditions may make getting pregnant impossible.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
Did you know?
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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).