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There are egyptian paintings showing colossal statues being dragged on sledges by crews of men with ropes. -- https://www.science.org/content/article/scienceshot-ancient-...

But how do you haul 70ton granite blocks 350 above ground? And then turn the? No one really debates how they dragged statues across flat ground.

That doesn’t mean “aliens” but lets not pretend its a solved problem.