Assume humanity vanished today. In another billion years, how hard would it be for a human-level civilization to find what we left on the moon?
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then we'll just have to leave something bigger
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Time to make more moons
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I was in a discussion about this very question years ago and Morlock has it right. It’s shockingly hard to make any lasting mark of any kind on that timeframe.
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Is this a branch from a "Silurian Hypothesis" question?
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