Replace "concrete" with "lunar soil" and we're talking.[1] [1]: https://www.space.com/19602-moon-colony-3d-printing-lunar-dirt.html https://www.space.com/19602

Replace "concrete" with "lunar soil" and we're talking.[1] [1]: https://www.space.com/19602-moon-colony-3d-printing-lunar-dirt.html https://www.space.com/19602-moon-colony-3d-printing-lunar-di...