Ever wish that you could take your Science Nerdyness to the next level? Well these people have by taking their favorite science interest and tattooing it on them. Tattoo a practice dated 5,200-years-ago, was originally applied by a sharp stick and ink, now has become $2.3 billion annual business in the U.S. To give a perspective of how common tattoos are, National Geographic stated, 15% of Americans were tattooed translating to approximately 40 million people, published in April 2000. Carl Zimmerl, a well established published science writer and blogger asked his geeky internet audience to share their science tattoos, to publish Science Ink. Below are some of his collection.