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Rigorous Science Natural subterranean cave formations on Mars

Is it possible that subterranean caves do/have existed on Mars? We know of the past existence of water on Mars. Which region (if any) of Mars would we likely find/expect to find a cave system bel...

3 answers  ·  posted 8y ago by socrates‭  ·  last activity 6y ago by socrates‭

Question space geography geology mars