Science
Where is the observatory where Percival Lowell first theorized the existence of Pluto?
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What piece of polished, cut glass can we use to see the spectrum of visible light?
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Which scientific term means "measure of resistance to flow in a liquid"?
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About how many years does it take for Pluto to go around the Sun for a complete revolution?
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What specifically is a bezoar called those results from persimmon ingestion?
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