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Q&A Realistic underground shelters for long time hibernation for mainly humans

Short variant of question: I have few big natural caves (really big). I want to transform it into shelters capable of keeping ~2.000.000 humans in hibernation, sleep, suspended animation or othe...

4 answers  ·  posted 7y ago by vodolaz095‭  ·  last activity 7y ago by vodolaz095‭

Question biology humans sleep hibernation