Science

Earthmen first sent a spacecraft to which planet?

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What blood vessels take blood away from the heart?
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How many tons of meteor dust fall to Earth every day?
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Which planet of our solar system has the most known moons?
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The definition of "process of removing salts from water using a membrane" best fits which science term?
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How many stages of metamorphosis does a grasshopper have?
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What do you call someone who studies earthquakes?
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What vascular plants do not have seed-bearing flowers or fruits?
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The modern equivalent of Aristotle's polis is an independent unit called what?
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