IMAGES: Slip Sliding Away

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Science  22 Jul 2005:
Vol. 309, Issue 5734, pp. 539
DOI: 10.1126/science.309.5734.539c

Glaciers the world over are dwindling because of global warming and other factors, but one place where you'll see ice expanding is this gallery from the National Snow and Ice Data Center in Boulder, Colorado. The collection recently tripled in size and now showcases more than 3000 photos of U.S. and Canadian glaciers, snapped between 1883 and 1995. Shots such as a 1931 picture of Alaska's Columbia glacier, which has re-treated some 15 kilometers in the last 25 years, can provide a historical baseline for studies of climate change and ice dynamics. Visitors can download images or order free high-resolution photos through the site.

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