The Wall Street Journal
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Ancient Tundra Discovered Under Greenland Ice Sheet
Posted
April 18, 2014
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April 18, 2014
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1:47Now PlayingA team of scientists have found organic soil that has been frozen to the bottom of the Greenland Ice Sheet for 2.7 million years, providing strong evidence that the ice sheet has survived many periods of global warming. WSJ's Niki Blasina reports. Photo: Joshua Brown, University of Vermont
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