John Provis, Robert L'Hermite Medalist 2013, Geopolymers

[@andresarce5514]

Amazing! and great entertaining speech!

[@abelw.6225]

Metakaoline is reactive by itself, no need to activate. according to davidovits

[@omemtodopoderoso]

hahahaahaha

[@1986BBG]

Yes they are manmade and then they added tool marks and made quarries to fake out future generations. Everyone has an opinion but the stones ate carved not mixed and then marked up to make them appear tooled.