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Tiwanaku / Pumapunku Megaliths are Artificial Geopolymers
In November 2017, an international team (a geologist from Universidad San Pablo at Arequipa, Peru and a member of the Geopolymer Institute) went on the site to carry on a survey on these stones. After different analysis on thin sections and under the electronic microscope, Joseph Davidovits claims that he has found "organic matter in volcanic rock", which is, by nature, impossible.