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).
OK, Thanos, for better or for worse, there are now dozens of replies to your OP.
I'm thinking it's time that you to reciprocate and submit your own thoughts about your original post. Do you believe those monuments were built during the 3rd or 4th millennium BC, or do you believe they were built "before" the 4th millennium, and if the latter, how far before?
How can any of us ever know, when all we can do is think?