If you want to see realistically how you could actually build a flat Earth, (or assumedly any of these), using only known physics, I recommend Isaac Arthur's video Megastructures: Flat Earths.
If you want to see realistically how you could actually build a flat Earth, (or assumedly any of these), using only known physics, I recommend Isaac Arthur's video Megastructures: Flat Earths.
If you want to see realistically how you could actually build a flat Earth, (or assumedly any of these), using only known physics, I recommend Isaac Arthur's video Megastructures: Flat Earths.