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Tundra in Northern Greenland Image 1
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Tundra in Northern Greenland (Image 1)

July 25, 2012
Tundra in northern Greenland. This photo was taken near Thule Air Base, the United States' northernmost base, located 1,207 kilometers (750 miles) north of the Arctic Circle and 1,524 kilometers (947 miles) from the North Pole on the northwest side of Greenland. The warming of the tundra is a major focus of scientific research. (Date of Image: 2007) [Image 1 of 3 related images. See Image 2.] Credit: Peter West, National Science Foundation