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Did you know?
The average adult has about 21 square feet of 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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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
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The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.