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Another 'Grand Canyon' Discovered Beneath Greenland's Ice : NPR »
Greenland is covered in an ice layer that's up to 2 miles thick. But below the ice, there's a vast terrain of bedrock. Now scientists have found a mega-canyon there, twice the size of the one in Arizona. The hidden canyon is drawing oohs and aahs from scientists around the world. Source Main page (current trends)
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