Can liquid water persist within an ice sheet?

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Scientists have discovered a large aquifer, the size of Ireland, near the surface of the Greenland Ice Sheet. “This was a big surprise,” said Jason Box, a researcher for the Geological Survey of Denmark and Greenland, “because we were drilling before melt had begun.” So liquid water had to survive since at least the previous year. Such water storage within the ice had not been previously considered, not on this massive scale. How can a giant reservoir of water exist inside a frozen ice sheet? Continue reading