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So start with a planet that is mostly made of a metal with a low melting point, say lead. It's set close enough to a star that during the day the surface becomes liquid, but it also has a low rotat...
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So start with a planet that is mostly made of a metal with a low melting point, say lead. It's set close enough to a star that during the day the surface becomes liquid, but it also has a low rotat...