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Q&A Open Polar Sea feasibility?

I know it's been proven false in our world, but what is the most plausible mechanism by which an Open Polar Sea could form and persist? I don't mean all the ice melting, but an open sea as it was ...

8 answers  ·  posted 10y ago by Adam Miller‭  ·  last activity 9y ago by Adam Miller‭

Question environment climate water water-bodies