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Q&A Rigorous Science Meta
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Q&A Advanced civilization on planet with atmosphere only in large sinkholes

I want to have an Earth-sized planet (with similar gravity) with an extremely low-density atmosphere (comparable to Mars) at most of its surface. Complex life, including an information-age civiliza...

7 answers  ·  posted 6y ago by taylor swift‭  ·  last activity 6y ago by taylor swift‭

Question atmosphere reality-check geology