A bunch of smarties at MIT’s Glass Lab figured out how to 3D print transparent glass. To achieve this they had to figure out how to build a 3D printer that could hold molten glass at temperatures greater than 1000 °C. And THEN they needed a nozzle that would extrude at that temp as well. Needless to say, they figured it out. They are from MIT after all. Thanks to them I have this hypnotizing video to share.