Earth

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

More Questions from Earth
Which of these habitats is a dry one usually with sand and can sometimes be very hot?
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What is the typical color of snow?
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What type of boundary is displayed at the Mid-Atlantic Ridge?
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At what point would one be standing if the trees were stunted?
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What is the common name for the Cenozoic Era?
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Lightning struck what eight times in 24 minutes?
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What color was the dust that swept the Great Plains?
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On October 11, 1999 the world population hit a milestone of how many?
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