/u/Stewart_Games's posts
Can "hybrid" caves form, in which some chambers are lava tubes, and others made by limestone dissolving?
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If you had a planet with a "dead" core, and were somehow able to heat and liquefy that core again, how long until new volcanoes form on its surface?
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Why did the British decide to trade opium to the Chinese for tea when they could just grow tea in India?
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