Science
What scientist is credited with developing the first vaccine?
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What is the opening of a lens, which controls the amount of light?
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A ramp is an example of which of these simple machines?
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What is the maximum number of electrons possible in the 6th energy level?
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Who is responsible for the Lost Continent of Atlantis theory?
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The modern equivalent of Aristotle's polis is an independent unit called what?
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Where is the observatory where Percival Lowell first theorized the existence of Pluto?
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What is the ripened ovary of a plant containing the seeds?
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