The snow on Mars fell from clouds around the planet's south pole during the Martian winter spanning 2006 and 2007, with scientists discovering it only after sifting through observations by NASA's Mars Reconnaissance Orbiter (MRO). The Martian south pole hosts a frozen carbon dioxide - or "dry ice" - cap year-round, and the new discovery may help explain how it formed and persists, researchers said .... http://www.sott.net
