Most of the images on this site were made available under the Creative Commons licenses Attribution or Attribution ShareAlike. Attribution means that you can share (copy, distribute and transmit the work) and remix (adapt the work), as long as you attribute the work in the manner specified by the author or licensor. Attribution ShareAlike means that you can share (copy, distribute and transmit the work) and remix (adapt the work), as long as you attribute the work in the manner specified by the author or licensor and as long as you distribute the resulting work only under the same or similar license.

A few are also in the public domain.

We give credit in all cases, even when not requested. All of them can be used as desktop wallpapers.
See individual photos for details about other uses.