The Grand Canyon in Arizona is one of the world’s oldest and largest natural marvels. Measuring 277 miles long, 18 miles wide at certain points, and a mile deep, the Canyon is mind-blowingly massive.
Brace yourselves for yet another gigantic natural wonder; a newly discovered canyon under Greenland at least twice as long as the Grand Canyon. Buried under at least two miles of ice, this canyon was found while performing routine studies on the ice sheets to measure glacier melting.
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