This image, originally posted to Flickr, was reviewed on 11 March 2012 by the administrator or reviewerMaterialscientist, who confirmed that it was available on Flickr under the stated license on that date.
https://creativecommons.org/licenses/by/2.0CC BY 2.0 Creative Commons Attribution 2.0 truetrue
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: cropped, shadows brightened, colours enhanced.