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The average adult has about 21 square feet of skin.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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There are more bacteria in your mouth than there are people in the world.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.