Yes, even science nerds get ink done - a double helix on the back, the chemical structure of serotonin on the side, some binary computer code on the forearm. It’s all showcased at Carl Zimmer’s Science Tattoo Emporium. Zimmer is a freelance science journalist who contributes regularly to The New York Times and runs the The Loom, a popular installation at Scienceblogs.com. He showed his Tattoo Emporium to a group of reporters last week at a conference on the future of science journalism. “There are ways to get out of the science ghetto,” Zimmer told the audience. “You just need to play around with the forms to find out how.”