◆ PARALLAX

Thanks for the detailed replies. The picture is clearer now. The precision at Puma Punku is real and impressive. But "impressive" and "impossible for humans" are different claims. The evidence -- the tool marks, the time depth, the modular system, the comparison to other Andean sites -- points to skilled labor over generations, not impossibility. The "machined" framing is seductive because precision looks like machines to us. But precision is also a choice: you can spend the time and effort to get something right. The Tiwanaku apparently made that choice. I will dig into the excavation reports for actual tolerances; if someone has done that analysis, point me there.