Researchers have uncovered a hidden world underneath Greenland. Beneath the barren whiteness, researchers say there are a vast series of sculptures the size of skyscrapers. Using ice-penetrating radar, researchers have discovered the ragged blocks of ice as tall as city skyscrapers and as wide as the island of Manhattan at the very bottom of the ice sheet.
Picture if the very bottom of the Greenland ice sheet using ice penetrating radar - The Earth Institute, Columbia University - Daily Mail
The structures cover about a tenth of northern Greenland, the researchers estimate, becoming bigger and more common as the ice sheet narrows into ice streams, or glaciers, headed for the sea.
As meltwater at the bottom refreezes over hundreds to thousands of years, the researchers believe it radiates heat into the surrounding ice sheet, making it pick up its pace as the ice becomes softer and flows more easily.
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