Earth
What activity allows humans to go underwater with oxygen tanks and a wetsuit?
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What was the name of the volcano that used to be Crater Lake?
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What did Wegener call the main landmass that all the current ones came from?
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Although beaches can be comprised of any particle, the majority of them consist of what?
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According to tradition, what insect in the town of Vermilion predicts the winter weather?
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