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Author Question: Which gas is produced when certain pollutants mix with sunlight? A) ozone B) nitrogen dioxide ... (Read 62 times) |
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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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.
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The average adult has about 21 square feet of skin.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.