Mysteries :
The Official GrahamHancock.com forums
For serious discussion of the controversies, approaches and enigmas surrounding the origins and development of the human species and of human civilization. (NB: for more ‘out there’ posts we point you in the direction of the ‘Paranormal & Supernatural’ Message Board).
I would consider the monoliths as geographic markers of claim. Earth's natural resources may have been staked out. If they are markers, they have withstood everything thrown at them so far and still they stand. Perhaps the claims have mined out and the markers were never removed.
Sorry, only registered users may post in this forum.