Huge canyon discovered under Greenland ice

The canyon - which is 800km long and up to 800m deep - was carved out by a great river more than four million years ago, before the ice arrived.
It was discovered by accident as scientists researching climate change mapped Greenland’s bedrock by radar.
The British Antarctic Survey said it was remarkable to find so huge a geographical feature previously unseen. Read more: bbc.co.uk.

Title: Huge canyon discovered under Greenland ice
Posted by:Unknown
Published :2013-08-31T21:07:00-07:00
Rating: 4.5
Reviewer: 7 Reviews
Huge canyon discovered under Greenland ice