"Undark" is what the U.S. Radium Corporation named the glow-in-the-dark - and radioactive - paint it produced for use on watches between 1917 and 1938. Hailed as a great innovation at the time, the paint tragically led to the premature deaths of many young, female factory workers, known today as the "radium girls." Undark, an online publication launched by the Knight Science Journalism Program at MIT this past spring, is dedicated to producing investigative journalism related to science. The editors write, "We appropriate the name ["undark"] as a signal to readers that our magazine will explore science not just as a 'gee-whiz' phenomenon, but as a frequently wondrous, sometimes contentious, and occasionally troubling byproduct of human culture." Edited and published by a team of prominent science writers, including Deborah Blum and Tom Zeller, Undark includes long-form investigative journalism, shorter articles, op-eds, documentaries, and news round-ups. The site has also produces a podcast, Colloquia, which accompanies longer investigative pieces. This online magazine is an especially useful source for those looking to better understand ethical debates in the scientific community.