[StructuredChaos]

I think "prefabricates" is referring to cement. Recent radiological studies of the pyramids and samples taken from them show that the blocks were not quarried and carried. Instead, cement was used to create the blocks.

The Egyptian Archaeological .... or whatever society, only recently allowed the sampling and radiological studying of the pyramids. I believe they wished to avoid confirmation of the theory that the pyramids were constructed using cement. The idea of cement kinda takes away from some of the mystique associated with the Pyramids.

Having said the above I don't why the posted article states, "The results of the Krakow geologists’ expedition do not confirm the research of American scientists, who claimed that the pyramids were built from prefabricates."
Maybe, I'm missing something.

It would have been nice to to see the satellite pictures of the craters and geoglyphs.

[dsc]

Thank you for taking the time and trouble to chip away at my ignorance.

I hadn't heard about the cement theory.

[Doomonyou]

I think "prefabricates" is referring to cement.

Technically speaking, "cement" is just an ingredient of concrete, along with aggregates, sand and water. It's the "glue" that holds it all together.