Adam Riess is the Thomas J. Barber Professor in Space Studies at the Johns Hopkins University Krieger School of Arts and Sciences, a distinguished astronomer at the Space Telescope Science Institute, and a member of the National Academy of Sciences. He received his bachelor’s degree in physics from MIT and his Ph.D. from Harvard University. Currently, he leads the SHOES Team in efforts to improve the measurement of the Hubble Constant, and the Higher-Z Team to probe the origin of cosmic acceleration by measuring distant Type Ia supernovae. In 2011, he was named a co-winner of the Nobel Prize in Physics and was awarded the Albert Einstein Medal for his leadership in the discovery that the expansion rate of the universe is accelerating, a phenomenon widely attributed to a mysterious, unexplained “dark energy” filling the universe. His accomplishments have been recognized with numerous other awards, including a MacArthur Fellowship in 2008.