I would like to use this graphic, or more precisely, a portion of it, in a blog entry I am going to publish soon. This image appears to be all over the web, but as far as I can tell from a google search, this appears to be the earliest incarnation of this image. I therefore wish to know, if it is possible, to whom I should attribute the picture, and whether or not any copyrights apply to it. Any assistance would be greatly appreciated.