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The smooth, flat, relatively crater-free northern lowlands fit the profile of a young geologic surface; However, recent findings of buried basin depressions imply the underlying lowlands crust is not as young as previously thought, but ancient like t
The physical and chemical nature of the light-toned layered deposits in Terby crater are consistent with deposition of material in a large, standing body of water much earlier in Mars' history.
Linear dunes are the most common dune forms on Earth, and they appear on all terrestrial planets that have an atmosphere, yet scientists still do not have a clear understanding as to how they form.
The southern region of Egypt where the Selima Sand Sheet is located was wetter and inhabited in the past. Now it is an uninviting monotonous, dry, vegetation-free expanse. We are examining this evolution.
Mauna Loa is the largest active volcano on Earth. New studies have provided insights into the emplacement processes for recent lava flows.