I heartily recommend all to (when time permits) to view this amazing brilliant lecture youtube vid, 1hr 2min
Tiwanaku / Pumapunku Megaliths are Artificial Geopolymers
It is easy to follow, scientific referencing peer reviewed material, historical documentation.
The ability to produce mind boggling megalithic stonework in Peru and Bolivia indeed all over Central and Southern America
surely at some time has attracted the interest of all who read GHMB Mysteries.
Many will disagree with the timeframes indicated however that is also briefly well supported.
Proven in the laboratory.
How long was this (special somewhat secretive) technology known, across the globe? I think perhaps well and truly as far back as 3rd millenia BC?
Have a listen /watch. Pause and think, about the implications and the issues it resolves!
PS Taking this opportunity to wish all a safe and Merry Xmas (or holiday period)