16 JULY 2014 

Ridges in Eridania BasinRidges in Eridania Basin
Eridania Basin has mounting geomorphic and spectral evidence that it may have been the site of an ancient inland sea.
The Icy Surface of the North Polar CapThe Icy Surface of the North Polar Cap
At Mars' North Pole is a dome of icy layers ranging up to 2 kilometers thick, roughly analogous to the Earth's ice caps in Greenland or Antarctica.
Ancient Lake Sediments in a CraterAncient Lake Sediments in a Crater
Our observation shows layered deposits, some with polygonal patterns, as might be expected from lake sediments.

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