A research paper recently published by a group of scientists from Northwestern University details their work with materials designed to simulate both lunar and Martian soils. The Northwestern team points out that the entirety of the work done with 3D printing simulated Martian and lunar regolith thus far has focused on hard materials, which are obviously necessary, but no one has yet tried using the soils to create and print soft, flexible materials, which will also be important in terms of meeting the needs of people in space. Read more at 3DPrint.com: http://3dprint.com/169376/northweste...rsity-objects/