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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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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
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There are 20 feet of blood vessels in each square inch of human skin.
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There are more sensory neurons in the tongue than in any other part of the body.
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Everyone has one nostril that is larger than the other.