Immense crater may have been found deep under Greenland's ice sheet
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NASA
NBC News
Geophysical Research Letters
MacGregor
Operation IceBridge
the Natural History Museum
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Joe MacGregor
Ludovic Ferriere
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Hiawatha
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Goddard Space Flight Center
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Greenland
Hiawatha
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Maryland
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Summary
After reviewing satellite images and aerial photos, a NASA glacier scientist has discovered a possible meteorite impact crater under Greenland's ice sheet.
As said here by David Freeman