So I was just browsing through ScienceBlogs the other day when I noticed something. See if you can spot it:

Can you figure out what those 91 ScienceBloggers have in common…

…that they don't have in common with those three?

Some notes: not all ScienceBloggers had pictures available. Those not represented here include: A Good Poop, Afarensis, the Angry Toxicologist, The Corpus Callosum, DrugMonkey, Effect Measure, Evolving Thoughts, Molecule of the Day, Neurophilosophy, Neurotopia (version 2.0), and Terra Sigillata. Also Intel ISEF and Page 3.14, but I figure that they don't really count. Sciencewoman, who makes up half of the team at On being a scientist and a woman is also not pictured. Some of the people in the 'white' list may not actually be white, I don't know, but they sure look white. I apologise if I am in error about any of them.