3D Printing - IN SPACE!
A good portion of this video recently posted on Joe Scott's YouTube channel covers the interesting possibilities for 3D printing in space. As pointed out in the video 3D printing has already been on-going aboard the ISS since 2013 for making tools.
As space becomes more commercialized for industry power generation and biomedicine could be using 3D printing. The regolith on the Moon and Mars could be used as the material 3D printed for manned bases eliminating the need for importing construction material to those locations.