There are lots of different 3D printing methods, and several of the technologies rely on extruding or squirting out pastes onto a surface from above. One company is working on a technology to extrude concrete and make buildings with it. Very spacey, very interesting idea, and there's the thought that we might use something like this to construct habitats on other planets. Neat stuff.
Or they could just use it rebuild/expand Brasilia:
ReplyDeletehttp://www.geocities.com/TheTropics/3416/