Hank Green's web-based biology program, Crash Course Biology, launched on January 30, 2012 and a new episode airs on YouTube every Monday. A recurring segment on the program is entitled "Biolo-graphy", in which Green relays a short biography of a person who is usually associated with the topic of the overall episode. For the benefit of uncertain viewers, Hank Green links YouTube annotations to every specific subtopic he explains in the video at the conclusion of the episode (the annotations replay the video starting from the particular annotation the viewer selects). On February 13, 2012, Hank Green uploaded "Office Hours: Water" for the purpose of answering additional audience questions. On May 19, 2012, Green uploaded outtakes of the series.