The Casting Theory suggests that certain megalithic stone blocks were not carved from solid rock, but instead were formed from crushed stone material mixed with binding agents and then allowed to harden.
One variation of the theory suggests that the blocks were pressed against each other while the material was still moldable, which could explain their extremely precise fit.
The theory is used to explain complex polygonal joints and the absence of obvious tool marks.
The problem is that analyses of the blocks, in most cases, reveal a natural crystalline structure rather than an artificially created material.
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