Hey! My buddy created that image. I really think you should attribute him as he spent quite a bit of time creating it. Otherwise, how will anyone else know that this image is available for them to use under creative commons as well?
I love these people – these defenders of the commons. Power to their elbows!
This thinkery comes from a thoroughly enjoyable conversation with Alan Levine.
You can use this image for free without changing it as long you include the attribution below: