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Author Question: Nacreous clouds form in the ____. a. troposphere b. stratosphere c. ionosphere d. mesosphere ... (Read 70 times) |
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.