Geoffrey Mo is a Brinson Postdoctoral Fellow at the Carnegie Observatories and at Caltech. His main research interests are in the birth, evolution, and death of binary stars, particularly those involving white dwarfs, neutron stars, and black holes. He uses large telescopes on the ground and in space to study these systems, which are responsible for many of the most energetic events in the universe. He is also interested in new astronomical instrumentation and is leading the development of a new high-speed imager for the 200-inch Hale telescope at Palomar Observatory. Geoffrey was an undergraduate at Carleton College and earned his PhD at MIT.