Uranium Cube

thingiverse

This is an approximate mockup of the uranium cubes used by the Nazis to create their first attempt at a nuclear reactor. Unfortunately, there aren't many photos for reference, so this is likely only close at best. I wish I could inspect one to get more accurate information. More info can be found here: https://www.npr.org/2019/08/31/755478866/have-you-seen-any-nazi-uranium-these-researchers-want-to-know P.S. If this looks familiar and you have something around from WW2 that matches this, please look at the article above.