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+--- Thread: Sacsayhuamán, the greatest mystery in America (/showthread.php?tid=982)
Sacsayhuamán, the greatest mystery in America - Paul Ferguson - 12-05-2023
"According to some researchers, the ancient inhabitants of the highlands mastered some alchemical techniques that allowed them to shape the rock to their liking and then make it very hard again. According to a legend spread in Cusco, Father Jorge Lira demonstrated in the last years of the 20th century that the technique to make stones malleable was true and that it was based on the use of a plant called jotcha. However, it seems that the priest failed to harden the rock again. In any case, his experiments were never supported by scientific evidence and the entire story always remained behind an aura of mystery."
https://www.neperos.com/article/s56qgj1db7e1ddf2