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Uploaded on Oct 4, 2011
On Tuesday, the Royal Swedish Academy of Sciences recognized Adam Riess, the Krieger-Eisenhower Professor in Physics and Astronomy at Johns Hopkins and a scientist at the Space Telescope Science Institute, for his leadership in the High-z Team's 1998 discovery that the expansion rate of the universe is accelerating, a phenomenon widely attributed to a mysterious, unexplained "dark energy" filling the universe.