3D Printing the Future Articles http://www.bbc.co.uk/guides/zp7x7hv https://www.smithsonianmag.com/science-nature/3d-printed-ears-grown-stem-cells-are-finally-on-their-way-180961605/ https://www.nasa.gov/mission_pages/station/research/news/3Dratchet_wrench http://www.iflscience.com/space/robots-could-use-3d-printing-build-mars-bases-astronauts-arrive/
