geekosystem

While Curiosity has been getting a lot of well-deserved attention lately, it's worth remembering that everyone's favorite rover isn't the only one doing cool stuff with Mars. When it's not getting some glamour shots of its ground-based cousin, the Mars Reconaissance Orbiter (MRO) is still finding out all sorts of neat things about our nearest sibling in the solar system, like confirming the suspicion that Mars has instances in which it snows dry ice -- carbon dioxide that has frozen at temperatures below -193 degrees Fahrenheit.