Billy Hudson , a mathematician, writes, “I was in a introductory Number Theory class when Professor David Ferguson told me that e^(ipi) + 1 = 0. Of course, Euler’s equation had the same affect on me as it has on many undergraduate mathematicians, i.e. I was hooked. I had the equation tattooed on my arm in May of 1998, thinking that if nothing else it would be unique. I’ve still yet to meet anyone else with the tattoo, but as your site shows, there are others (although I still think I may have been the first :).”

You can see the rest of the Science Tattoo Emporium here or in my book, Science Ink: Tattoos of the Science Obsessed.

Originally published July 14, 2010. Copyright 2010 Carl Zimmer.

Matt writes, “I took an alternate path to understanding the world from most of your readers. I switched from psychology to history in order to better research what really happened as opposed to what kids are taught in school. A concept that stuck with me and in fact is a critical reference point for me in every day life is our tendency to seek patterns and to see things that aren’t there. As a tribute to the fallibility of our complex brains my first tattoo is a visualization of the Gestalt Law of Closure.”

Click here to go to the full Science Tattoo Emporium.

Originally published July 13, 2010. Copyright 2010 Carl Zimmer.