Own work I originally uploaded the image at Flickr under my account DiverseMentality (this was my original username on both the English Wikipedia and Commons). There, it is licensed under Creative Commons, Attribution and Share Alike 2.0. I made slight modifications to the contrast, levels, and colors of the original.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.