I can't read Japanese and just watched the videos, but what they illustrate seems pretty strange. Why is it mostly water instead of human living space? If the

I can't read Japanese and just watched the videos, but what they illustrate seems pretty strange. Why is it mostly water instead of human living space? If the water's meant to let in more light, that's more likely to end up boiling the water during the day and freezing it solid overnight. https://en.wikipedia.org/wiki/Moon#Surface_conditions https://en.wikipedia.org/wiki/Moon#Surface_conditions