National Public Radio: A major feature of the Earth has escaped notice - until now.
Scientists reported Thursday that they've discovered a vast canyon, twice as long as the Grand Canyon. It carves a deep scar from the center of the world's largest island out to the coast. And, oh one more detail: It's buried beneath as much as 2 miles of ice.
Yes, we're talking about icy Greenland.
You may not think of it when you fly over, but beneath all that ice is a hidden terrain of bedrock. Jonathan Bamber from the University...