re: Let's assume the pyramids were actually power plants...

A. This is likely pure internet bullshite

B. I prefer to think that the pyramids are a marker. They're calling attention to that spot for the future. There's too much high level mathematics going on there to be primitives a few thousand years ago building it. They likely just chisled their stuff on the walls.

When a civilization gets technically advanced enough to realize those things are impossible then start studying all the ratios and whatnot and eventually develop the technology to see underneath it, then get the tech to actually penetrate it and get inside those columns, what if it's like our seed bank in Norway or wherever it is? What if there's a library down there from whatever advanced society built those things? Stuff that could give us the boost we need to spread out before, like them, we get snuffed here on earth by whatever catastrophe comes along.