The drainage must have been the hardest problem, but I assume they let gravity take care of that while we use pumps nowadays. But this means they only could build underground in hills and mountains.
But if they could make the water run out, then sewage and ventilation is basically also solved as the heat difference between outdoors and the cave town will create draft, and you can get power that way too but I don't know if they were that advanced.
And what about light? There was technology for mirroring sunlight with metal shields far into tunnels. In that way there wasn't a need for fire during daytime.
There ARE plenty of underground bases, including the one at Pine Gap Australia - right in the middle of nowhere. It definitely is not connected to anything.
I was talking about the ancient underground towns that (We assume...) didn't have access to electrical lamps. With modern lamps, pumps, ventilation, filters, electrical plants and lifts, a lot of the problems the underground ancients had are kind of automatically solved.
Unless there is some huge underground civilization that is keeping itself hidden from us, the ancient underground townspeople never solved how to generate power and light to grow crops underground, but today that is very doable with nuclear, geothermal and/or hydro power.
The only reason this isn't happening is because it's cheaper and nicer at the surface.
Re all the underground places:
How did/do they manage for air, food, medical care, power, water and sewage?
The drainage must have been the hardest problem, but I assume they let gravity take care of that while we use pumps nowadays. But this means they only could build underground in hills and mountains.
But if they could make the water run out, then sewage and ventilation is basically also solved as the heat difference between outdoors and the cave town will create draft, and you can get power that way too but I don't know if they were that advanced.
And what about light? There was technology for mirroring sunlight with metal shields far into tunnels. In that way there wasn't a need for fire during daytime.
I did mention power....
There ARE plenty of underground bases, including the one at Pine Gap Australia - right in the middle of nowhere. It definitely is not connected to anything.
I was talking about the ancient underground towns that (We assume...) didn't have access to electrical lamps. With modern lamps, pumps, ventilation, filters, electrical plants and lifts, a lot of the problems the underground ancients had are kind of automatically solved.
Unless there is some huge underground civilization that is keeping itself hidden from us, the ancient underground townspeople never solved how to generate power and light to grow crops underground, but today that is very doable with nuclear, geothermal and/or hydro power.
The only reason this isn't happening is because it's cheaper and nicer at the surface.