Tony Tyson is the Chief Scientist of the Large Synoptic Survey Telescope. His research interests are in cosmology, dark matter, dark energy, observational optical astronomy, experimental gravitational physics, and new instrumentation. He has been a Distinguished Professor of Physics at UC Davis since 2003. He received his Ph.D. degree from University of Wisconsin in 1967 and was a Member of the Technical Staff at Bell Laboratories from 1969 to 2003. Honors: member American Philosophical Society, member National Academy of Sciences, Aaronson Memorial Prize, Fellow, American Academy of Arts and Sciences, and Fellow, American Physical Society.