06-15-2016, 03:54 AM
(06-15-2016, 03:42 AM)Minstrel Wrote: If they could do it...why can't we?
Anyone up to the challenge?
If the structures didn't cave-in through the millenia -- that would be astounding.
How long would it take to 'build' one of these underground cities?
Constant year-round temperatures. No air conditioning or heating needed. Just the ventilation system to keep fresh air/oxygen flowing through. They might even have access to their own subsurface water supplies...
We might all have to go there to survive soon, if things don't change. Don't forget your favorite pillow, p.j.s and toilet paper.
