How subtraction, not addition, may have been the secret to Egypt's pyramids

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 never work. This theory works. This theory treats the pyramids as an engineering problem and takes the constraints very seriously. — Read the rest The post How subtraction, not addition, may have been the secret to Egypt's pyramids appeared first on Boing Boing.