https://www.techdirt.com/articles/20200225/14150743985/smithsonian-releases-28-million-images-3d-models-into-public-domain.shtml

Here's some good news for a change. The Smithsonian has just announced Smithsonian Open Access, in which it has released 2.8 million high quality digital images and 3D models into the public domain under a CC0 public domain dedication.

With Smithsonian Open Access, we’re increasing the public’s ability to use millions of digital assets—2D and 3D images and data. Open Access items carry what’s called a CC0 designation. This means the Smithsonian dedicates the digital asset into the public domain, meaning it is free of copyright restrictions and you can use it for any purpose, free of charge, without further permission from the Smithsonian. As new images are digitized, if they are determined to be copyright-free, the Smithsonian will dedicate them as CC0 ongoing.