http://blogs.discovermagazine.com/imageo/?p=18771
A very curious feature has long been visible in satellite images of Greenland’s massive ice sheet, but until now, no one really knew for sure what formed it.
You can see the feature for yourself in the satellite image at right — look for the conspicuously semi-circular edge to the ice sheet.
As it turns out, that semi-circular shape hints at what’s below a layer of ice more than a half mile thick: a massive impact crater that has been hiding in plain site.
Research shows that it
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November 16, 2018 at 04:15PM