The theory that aliens assisted the builders of ancient monuments was popularised by Swiss author Erich von Däniken in his ...

Ancient Egyptians had none of our technology, but managed to complete the megalith almost unnaturally fast.

The Giza Pyramids are among the best documented construction projects of the ancient world, yet a stubborn slice of popular culture still credits them to visitors from another planet. I want to ...

Every few years, someone comes up with a new "this is how the pyramids were built" theory. In addition to aliens or long-forgotten super technologies, many theories rely on unfeasible ramps that'd ...