Science
How many years are in a sunspot cycle?
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What university did astronomy and space science theorist Carl Sagan teach at?
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Which branch of science did young Carl Sagan tell his grandfather he wanted to practice?
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What is the maximum indirect fire range of a Browning M2 .50 caliber machine gun?
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Which of these is a virus that doesn't immediately cause damage to tissue?
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During the seventeen hundreds, what creature was thought to excrete blood through its skin?
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The four engines of a Boeing 747 jet produce 188,000 pounds (85,275 kilograms) of what?
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