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Experts are divided on what color skin the Incas had, but we know they invented geopolymers that poured like concrete.
(lemmy.world)
Edit: Cropped the image. The last person said a few crazy things but overall they were making a good point, so I thought better of including it.
That doesn't even look poured, haven't they ever seen a grout line? It looks like a shaped piece, where you're not quite able to get it completely perfect, just really close.
You sound like you have knowledge and experience. However, have you considered getting on Facebook and just saying something silly but with confidence?
8 foot giants with their teeny tiny bags of concrete
“Alleged” 8 foot giants.
Why would they even need 8 feet? Were they an alien race of spider people perhaps? I think yes they were. I'm off to Facebook now to tell the masses.