This collection of .stl files and 3D pdfs has been curated from various open-source locations. They have all been post-processed for optimized 3D printing. These files are not for commercial use and should be used for outreach/education purposes only. Many of these files are protected under the Creative Commons Attribution-Non Commercial-Share Alike License. If you see a file that should not be hosted here, please contact us and we will resolve the issue immediately.