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To: ggersh who wrote (169791)3/22/2021 11:12:22 PM
From: sense1 Recommendation

Recommended By
dvdw©

  Read Replies (1) | Respond to of 217768
 
Didn't we do this already once before ?

Far and away the least stupid explanation backed with the most scientific evidence, including over-lapping instances of "can't possibly be anything else" in more than a few cases:

Davidovitz from 2006, re Egypt

Updated criticism from 2015, re Egypt

Huge progress since then... not just in relation to the "archaeology of", but... just that, here, re Peru:

[url=https://www.researchgate.net/publication/330147422_Ancient_organo-mineral_geopolymer_in_South-American_Monuments_Organic_matter_in_andesite_stone_SEM_and_petrographic_evidence]Organic content[/url] is not possible in a natural volcanic andesite tuff welded en masse at or > 1700-1800C

Geopolymer in South-American monuments: two scientific papers published

Davidovitz lecture on Youtube: Tiwanaku / Pumapunku Megaliths are Artificial Geopolymers