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The Discovery of Global Warming June 2010
The Pasterze Glacier in Austria in 1875 and 2004. Like nine-tenths of the glaciers around the world, it has been retreating; the rock exposed has not seen daylight for thousands of years. (For more pictures of global warming effects see Gary Braasch's photos.) Left: Courtesy H. Slupetzky / University of Salzburg; Right: Copyright © 2004 Gary Braasch, reproduced by permission. Page Copyright © 2005 Spencer Weart & American Institute of Physics