Quote Originally Posted by BarryBobPosthole View Post
UFOs aside, I would like to understand how stoneage humans built monolithic, astronomically accurate structures with basic tools and virtually no math.

I think if we could answer that, it might put to rest a lot of UFO questions too. Not that I believe most any of the von daniken type theories out there. But the questions haven’t been logically answered in any otherway either.
BKB
It's interesting that they managed to do this on every continent as well. Whether you believe him or not Graham Hancock has an interesting theory as shown in the Netflix series Ancient Apocalypse.