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Author Question: We usually find dark molecular clouds beside bright emission nebulae. Indicate whether the ... (Read 47 times) |
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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.