This wild-looking house is made out of dirt by a giant 3D printer
These 645-square-foot domed buildings were printed in Italy over the course of 200 hours.
Giant 3D printers for construction can help make housing more affordable—as in a neighborhood in Austin, Texas, where a 33-foot-long machine recently squeezed out the walls of tiny new houses for people who were once chronically homeless. But an Italian architecture firm is experimenting with a way to potentially make the process even less expensive, and better for the climate, by using a cheap and readily available building material: local soil.