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Apr 14, 2021 at 19:28 comment added Nosajimiki Derinkuyu is believed to be a hiding place during times of war, not a permanent settlement. I'm not saying living underground is impossible without electric lighting, just not as pleasant as you may imagine.
Apr 14, 2021 at 18:41 comment added Allan check out from 8th–7th centuries BCE en.wikipedia.org/wiki/Derinkuyu_underground_city
Apr 14, 2021 at 18:35 comment added Nosajimiki underground living was not practical pre-industrial era due to the difficulting of lighting a room with no window access.
Apr 13, 2021 at 11:45 history answered Allan CC BY-SA 4.0