This file is licensed under Creative CommonsAttribution ShareAlike 2.0 License (cc-by-sa-2.0). In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it under this or a similar cc-by-sa license.
This image was originally posted to Flickr by moritzwade at http://flickr.com/photos/19503391@N00/1249005889. It has been reviewed on 06:17, 19 February 2008 (UTC) by FlickreviewR, who found it to be licensed under the terms of the cc-by-2.0, which is compatible with the Commons. It is however not the same license as given above, and it is unknown whether that license ever was valid.