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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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There are 60,000 miles of blood vessels in every adult human.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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If you could remove all of your skin, it would weigh up to 5 pounds.