This article presents brief biographies of 15 world renowned scientists (from the 18th, 19th & 20th century) who committed suicide, including: Ludwig Boltzmann, Paul Ehrenfest, Hans Fischer, Felix Hausdorf, William Henry, Otto Honigschmid, Aleksandr Lyapunov, James MacCullagh, Ettore Majorana, Benjamin Martin, Augustus Matthiessen, Victor Meyer, Hugh Miller, Johannes Muller, & Max Pettenkofer. (VM)