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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?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Did you know?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.