Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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There are 60,000 miles of blood vessels in every adult human.
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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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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
Genetic analysis begins with mutants
Perspective analysis of Leonardo da Vinci, The Last Supper.