Marcell Fóti is an ancient mysteries researcher who is trying to figure out how the ancient Egyptians and other cultures were able to carve stones with sub-millimeter precision with relatively primitive bronze tools. Fóti’s experiments with geopolymers - ceramic polymers that can easily be mistaken for natural stone - have led him to the conclusion that the inexplicable stonework of the ancient world doesn’t have to remain a mystery. We talk to him about Natron Theory, the five part explanation for how Egyptians made their false stones, the role that natural salt deposits play in the development of a stone-making civilization, evidence that precise stonework and natron are correlated around the world, and the open questions about the ancient stone makers that remain.