the pyramids were built by evolved shapeshifting octopi from the deep oceans (from earth or another realm). they can break, shape, polish and levitate any object with theirinds because their brains emit a strong electromagnetic field. they can contract their brains rapidly thus creating a pulsewave that shakes any object they want in any way they want at a molecular level. if they cam from another realm they did so in spaceships made of hollowed rock that they shaped using this pulse technique. filled up with water, which is their breathing medium, and sealed with their brain pulses once they're inside. the spaceship travels with this same levitating technique. when they're not underwater they shapeshift a suit between their skin folds that they fill up with water. the outer skin layer sheds with time, so they have to go into the water regularly to regenerate new outer skin.
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