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Twitter 上的Graham Hancock:"The giant megaliths of Puma Punku bear witness to an immense task carried out in remote antiquity by unknown hands at an altitude of almost 13,000 feet above sea
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Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. – Geopolymer Institute
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Reconstructing ancient architecture at Tiwanaku, Bolivia: the potential and promise of 3D printing | Heritage Science | Full Text
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