Tattoos are the defining fashion statement of the present generation. A few years ago, the writer Carl Zimmer was at a pool party and found that a young scientist friend of his, a neurobiologist, had a double helix printed on his back — a little strand of DNA. Zimmer blogged about it, and before he knew it, dozens of scientists, mathematicians, and other academics were sending him photos and stories about their tattoos. Not anchors, skulls, and hearts, but creative designs that represent lifelong passions. Zimmer compiled a book called Science Ink.
