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Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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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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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.