Advanced technology plays no part in the production of s. ...An individual of the could produce geopolymers... [with] the knowledge that comes from i… - Joseph Davidovits

So we have the text, and the first one is the... renowned... Famine Stele at Sehel... engraved in 2000 BC... a copy of more ancient texts dating to the time of the pyramids. ...We have the Pharaoh , the builder of the first pyramid, that is worshiping the god Khnum.

[W]e can interpret... two elements... of the industrial activities. First, we may suppose that there had been exhaustion in the Sinai mines. Some minerals are used to make artificial stones, and we have texts... that show... the Sinai mines were very heavily exploited, and afterwards, no longer. Or the manufacture or lime-ash generated an ecological disaster. This is the lime... in the reaction... [with] the () [in water] to... produce the caustic soda that will start the ic reaction.

They turned back to mud because mud bricks is also a replica of incarnation, in the materials that belong to the Khnum divinity.