Smithsonian Open Access: Open Educational Images (and a little bit about copyright)
Have you ever desperately needed the 3-D printed hands of Abraham Lincoln or a mammoth skeleton, but just couldn't find the right file? Good news, everyone-- the Smithsonian has released over 2.8 million images (high resolution, 2- and 3-D) from across its 19 museums and institutions into the public domain under a Creative Commons Zero (CC0) license, meaning they are available for anyone to "copy, modify, distribute and perform the work, even for commercial purposes, all without asking