Photographs of people sporting evolution-themed tattoos (e.g., www.flickr.com/photos/cpurrin1/2848986210/ ). Also appropriate are photographs of phylogenetic trees drawn on skin with pens or body paint. Essentially, images that show evolution fans flaunting their acceptance of evolution in some creative way.
Public displays of affection for evolution are very rare in some countries, so the images here are intended to catalyze more open discussion of Darwin's ideas, especially among kids and youth.