4 ms·

Check http://geopolymer.org http://geopolymer.org About a concrete technology that probably existed worldwide. Because a lot of these structures are very old

Check http://geopolymer.org http://geopolymer.org About a concrete technology that probably existed worldwide. Because a lot of these structures are very old and some are even under water, I think that they likely existed during the ice-age. Later cultures like the Incas build on top of these huge structures.

galaxyLogic 7y ago
Fascinating stuff "Archaeologists cannot give any rational explanations on how this was possible." ... "Several people tried to discover the secret of this stone making. They were successful in softening the limestone that they reduced to a soft mass. But they failed to harden it again. This has been the reason, why, 40 years ago, Davidovits and Aliaga stopped their studies. They could disaggregate (limestone) but they were not capable to re-agglomerate it, to harden it again. The appropriate knowledge was acquired very recently (2 years ago)"
emmelaich 7y ago
Interesting, but the Prof Joseph Davidovits sounds like he is on the fringe of theories with respect to these stones. Paper via wikipedia: https://www.tandfonline.com/doi/abs/10.5408/0022-1368-40.1.25?journalCode=ujge19 https://www.tandfonline.com/doi/abs/10.5408/0022-1368-40.1.2... > It is not easy to give a geological education to a brilliant and determined chemist. Savage