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Giant Canyon Discovered Under Greenland Ice Sheet

Giant Canyon Discovered Under Greenland Ice Sheet

National Geographic - Jaclyn Skurie

The subglacial bedrock canyon is nearly twice as long as the Grand Canyon. Imagine if you could pick up the Greenland Ice Sheet and see what lies beneath. Surely 1.7 million square kilometers of slowly thawing ice must rest on a massive pool of melted water, right? Not necessarily, according to a …

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