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There are 60,000 miles of blood vessels in every adult human.
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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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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").