Amazing Views of the “Mega-Canyon” Discovered Under Greenland's Ice

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Aug. 30 2013 9:30 AM

Amazing Views of the “Mega-Canyon” Discovered Under Greenland's Ice

A newly discovered canyon lying beneath a 4-million-year-old ice sheet in northern Greenland appears to be 750 kilometers long and up to 800 meters deep.

Video by Reuters. 

Videos curated by Slate staff.