“I would like to share what my friends call my ‘science nerd’ tattoo with you! I am currently doing my PhD in Zoology and have been fascinated by the biological world for as long I can remember, so when I decided to get a tattoo it seemed logical that I look within my field for inspiration….It took 4.5 hours, and certainly didn’t tickle, but I love that I have such a beautiful representation of evolution and the natural world with me all the time.” [Tattooist’s site: http://www.eternalinstinct.com/]

Carl: The tree of life has changed shape over the years. On another tattoo, you can see a nineteenth century version, its branches reaching upward through time. Today, scientists use DNA to