All of these resources are free to download and use. Of the more than 350 models, 123 are 3D printing files. 3D printable models include the Moon and Mars landing sites, asteroids (such as Bennu and ...

More affordable than ever, 3D printers are booming for personal, professional, and educational use. Here's everything to know before you buy one, along with the top models from our hands-on testing.