Earth

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

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What type of boundary is displayed at the Mid-Atlantic Ridge?
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A weather proverb says "A year of snow," followed by what?
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Groundhog Day predicts how long what will last?
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Where are the Horse Latitudes located?
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Cumulus and stratus are types of what?
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Galileo was a 17th century astronomer famous for discovering that the Earth did what?
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Which type of irrigation is most commonly used throughout the world?
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What is another name for layers of rock?
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