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Did you know?
The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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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).
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The familiar sounds of your heart are made by the heart's valves as they open and close.