About the author
Karen Rowan
Karen Rowan, Live Science Contributor

Karen writes about all things health for Live Science. She has written for Discover and Popular Mechanics magazines, and worked as a correspondent for the Journal of the National Cancer Institute. She holds an M.S. degree in science and medical journalism from Boston University, as well as an M.S. in cellular biology from Northeastern Illinois University. Prior to becoming a journalist, Karen taught science at Adlai E. Stevenson High School, in Lincolnshire, Ill. for eight years.