Descript |
1 online resource (8 min.) |
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000714 |
Note |
On July 8, 2012, NASA satellite imagery showed about 40 percent of Greenland's top ice layer had begun its summer thaw. By July 12, only four days later, 97 percent of the ice had thawed. Margaret Warner asks NASA's Thomas Wagner for a scientific explanation of the massive change. |
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In English. |
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