The stones are fastened together without mortar.
They are set on top of each other using their
weight to keep them together. The craftsmanship
detail is so fine and the stones are connected
with such precision that no light passes through
the joints.
Modern humans are at least 100,000 years old. Most of our earlier civilizations are probably along the coasts of the continents, and were submerged at the end of the last ice age. It's silly to think that technology has not been lost and rediscovered over and over again.
I take note of people who are still masking, but I have compassion for their fear so I don't say anything.