Thursday, August 29, 2013

Huge Canyon Discovered in Greenland

Bigger than the Grand Canyon.

Data from a NASA airborne science mission reveals evidence of a large and previously unknown canyon hidden under a mile of Greenland ice. 
The canyon has the characteristics of a winding river channel and is at least 460 miles long, making it longer than the Grand Canyon. 
In some places, it is as deep as 2,600 feet. 
This immense feature is thought to predate the ice sheet that has covered Greenland for the last few million years.

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