A vast and previously unmapped gorge, 800 metres deep, has been found under ice in Greenland.<br /><br />The canyon is 750 kilometres long and is said to be comparable in scale to parts of the Grand Canyon that is twice as deep - 1.6 kilometres - at its deepest.<br /><br />The Greenland canyon is buried under deep ice.<br /><br />...<br />http://www.euronews.net/
