Earth

What was the nationality of the scientist who demonstrated a heliocentric system?

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What evidence tells scientists that some dinosaurs may have lived together in groups?
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What is water that flows over the ground rather than seeping into it called?
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What are mounds of sand that have been windblown called?
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In weather terms, what turns to water in a "spring thaw"?
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What is the hottest place on earth?
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The "Bergeron process" deals with what kind of precipitation?
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What does a konimeter measure?
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Where would you find the abyssal plain?
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