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“YO-LyleGlacier-comparison_NPSReport2015_612x604”

"Comparison of Lyell Glacier from 1883 (public domain) and 2015 (photo by Pete Devine) from Yosemite's Melting Glaciers U.S. Geological Report page 9…"

"Comparison of Lyell Glacier from 1883 (public domain) and 2015 (photo by Pete Devine) from Yosemite's Melting Glaciers U.S. Geological Report page 9…"