Robotic Printer Could Build Moonbases

While these types of 3D prototype printers have been around for several decades, they are now large enough to create small buildings.

clipped from www.physorg.com The printer can be moved along horizontal beams and four vertical columns, and the printer head is raised by only 5-10 mm for each new layer. The printer is driven by a computer running CAD software and prints at a resolution of 25 dpi (dots per inch). The completed material resembles marble, is stronger than concrete, and does not need iron reinforcing. The printing process can successfully create internal curves, partitions, ducting, and hollow columns.