Tattoos have become a popular way for people to express themselves, but new research is raising concerns about the safety of tattoo ink. Scientists have found evidence suggesting that certain ...

John Swierk is an assistant professor of chemistry at Binghamton University, State University of New York. Tattoos are an incredibly common form of permanent self-expression that date back thousands ...

(CNN) — If you clicked on this story, you likely either have or are thinking about getting some ink. It might be your first embellishment (in tattoo-speak, you're a tenderfoot), or maybe it's your ...