RT @HiRISE: Photo: Jeans Crater Dunes – We’ve got defrosting of carbon dioxide ice, sublimation and dune ridges… tmblr.co/ZPDFlteqSGTv
RT @HiRISE: Photo: Jeans Crater Dunes – We’ve got defrosting of carbon dioxide ice, sublimation and dune ridges… tmblr.co/ZPDFlteqSGTv