Science
What is defined as the average distance from the Earth to the Sun?
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Which song was used to wake up the first Space Shuttle crew in orbit?
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What dust-like particles are only found on plants like ferns, mosses and mushrooms?
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Discovered by Alexander Fleming, what is now used to treat infections?
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What was the name of the first artificial satellite launched into space?
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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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What is the reproductive organ of most seed-bearing plants?
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