Below the Ice

This past fall scientists uncovered a vast landscape that has been "frozen in time" under the Antarctic Ice Shelf. Here is a nice graphic from phys.org.

The topography was determined by a combination of radio wave echoes and satellite images. This landscape, more than 2 kilometers below the ice has remained untouched for over 34 million years though global warming is threatening to expose it. The landscape was home to forests, river valleys and probably animals before being buried under ice. This landscape is less well known than that of Mars according to glaciologist Stewart Jamieson. 

Here is another view of the topography under the ice via Nature.