It's Springtime on Mars, and the Dunes are Defrosting

Nothing says springtime on Mars like defrosting dunes. In Mars' northern hemisphere, springtime has arrived, and observations from the HiRISE (High Resolution Imaging Experiment) onboard the Mars Reconnaissance Orbiter has captured partially defrosted dunes on the western slope of dunes inside Kaiser Crater. In the winter, the dark sand dunes are covered in a blanket …