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[–]jet199 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

So they have the same thing in Peru in various stages so they know how it was done.

They literally just hold the next stone above the others and kept chiseling it until it fits perfectly. It's not really a special technology, more an extremely labour intensive one.

The Egyptians didn't lose this tech, rather they developed other methods which worked just as well.

The Greeks also had this type of building in the bronze age. By the classical period they developed the technique of painting the joining sides red so if they didn't fit exactly the red would show. So they didn't lose this technology, they actually improved on it.

[–]zyxzevn[S] 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (0 children)

I know what you are stating, and that theory has been debunked before. It could have been used for only the small stones that the incas build on top of the huge stones. But it is mostly a theory from an engineer that just made it up without researching the full constructions.

No scientist/engineer has ever made one replica of the stones with any of the proposed technologies. That is explained in the video.

Many of these perfect-fitting stones are 100 tonnes and more. Extremely hard to move.
The lines are extremely straight (in Egypt) and surfaces extremely smooth (especially the boxes).
In the unfinished stones we can see saw-like cuts. The boxes are then smoothed up leaving shiny glassy surface.
The smoothness of the boxes is under micrometers, and some of these boxes are in extremely hard to reach underground places.

Not in the video:
In Peru the big stones have different shapes and were there before the Incas arrived (according to the Incas).
Many have small holes between the stones that connect them via H-shaped material. I assume that they had metal connectors (iron or bronze).
Brien Foerster has some great videos with those.