Hidden beneath Greenland’s ice sheet is a massive canyon that’s more than 460 miles long and up to 2,600 feet deep at points…. Hidden beneath Greenland’s ice sheet is a massive canyon that’s more than 460 miles long and up to 2,600 feet deep at points. [Read more]

image 'Mega-canyon' discovered under ice in Greenland 'Mega-canyon' discovered under ice in Greenland 'Mega-canyon' discovered under ice in Greenland 'Mega-canyon' discovered under ice in Greenland




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