Jan 252013
 
Thawing 'Dry Ice' on Mars Proves the Planet is Still Active

  Researchers using NASA’s Mars Reconnaissance Orbiter (MRO) see seasonal changes on far-northern Martian sand dunes caused by warming of a winter blanket of frozen carbon dioxide. Seasonal Changes on Far-Northern Mars: The High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars Reconnaissance Orbiter snapped this series of false-color pictures of sand dunes in the [continue reading]

Sep 132012
 
It's Snowing Dry Ice on Mars

  NASA’s Mars Reconnaissance Orbiter (MRO) data have given scientists the clearest evidence yet of carbon dioxide snowfalls on Mars. This reveals the only known example of carbon dioxide snow falling anywhere in our Solar System.  NASA’s Mars Reconnaissance Orbiter passes over the planet’s south polar region in this artist’s concept illustration. Image Credit: JPL/NSA [continue reading]