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Q&A How could you dig a hole through the fluid mantle of a planet?

The Question of the Tunnel through a Planet grinds my mind. How could you dig a Hole through the fluid mantle of a planet? Would your walls not constantly break and collapse on you after the 15-...

5 answers  ·  posted 10y ago by Fulli‭  ·  last activity 5y ago by Fulli‭

Question planets geology macroengineering engineering