[Jeff Chandler]

That's what Dr. Davidowitz has been saying for 30 years.

www.geopolymer.org/category/archaeology/pyramids

[ansel12]

Yeah this is an old idea.

[arthurus]

I have seen this speculation before on FR, a few years ago. It would be a much easier explanation than hauling those humongous blocks in those humongous numbers from far away then raising them into place. If it finally turns out to be correct.