The age of discovery isn't over yet. A colossal canyon, the longest on Earth, has just been found under Greenland's ice sheet.
via Discovery News http://news.discovery.com/earth/rocks-fossils/greenland-longest-canyon-discovered-130830.htm#mkcpgn=rssnws1
via Discovery News http://news.discovery.com/earth/rocks-fossils/greenland-longest-canyon-discovered-130830.htm#mkcpgn=rssnws1
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