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Science  06 Aug 1999:
Vol. 285, Issue 5429, pp. 799
DOI: 10.1126/science.285.5429.799a

Sweltering in the summer heat? Cool off with a visit to the Web gallery at the National Snow and Ice Data Center in Boulder, Colorado. Among its offerings are two dozen black-and-white photos of glaciers, such as curvy Barnard Glacier, Alaska, in July 1957, striped with lanes of ice and debris. The pictures, from an American Geographical Society collection of 10,000 images dating to the 1880s, are occasionally used by scientists to see how fast glaciers are growing or shrinking. Other images include satellite photos chronicling the dramatic breakup since 1995 of the Larsen B ice shelf in Antarctica—possibly a result of local climate warming—and nifty animations of sea ice waxing and waning at the two poles.

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