Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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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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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
The process of respiration.
A Summary of the Star Formation Process
The Water Cycle
Reactions of the glyoxylate cycle
The stages comprising an arbitrary cell cycle
Bone Healing. The Bone Repair Cycle. Presentation of a Forearm Fracture