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 totally agree that the GP's were built much longer ago than 'orthodoxy' thinks.
I also think from the many books I have read on this, that there is very little original thinking. We should probably realize that the AE knew a great deal more than we do.
Ed Leedskalnin who built the Coral Gardens in Florida knew about levitation.
So do Tibetan monks according to some reports.