Greenland's rock underbelly exposed
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Greenland's rock underbelly exposed

Scientists have stitched together decades of survey data to show what Greenland looks like without its ice cover.

The new map reveals a hidden world of mountains and canyons.

Dr Mathieu Morlighem from the University of California at Irvine, US, was a key figure behind the venture. He spoke with our science correspondent Jonathan Amos.

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