Since 2009, NASA's Kepler Space Telescope has been scanning the Milky Way, looking for Earth-sized planets that could potentially support life. Scientists recently narrowed the field to 20 planets that are most likely to harbor living things - but it's going to take some work and time to confirm anything. However, 3D printing might help us get there - through a massive 3D printed observatory constructed on the moon. Read more at 3DPrint.com: https://3dprint.com/145210/3d-printed-telescope-moon/