Speaking of ice on Mars, the folks with the Mars Reconnaissance Orbiter made a cool video talking about new low-latitude craters exposing water ice beneath the Martian surface:
You can watch more HiRISE videos at the MRO video gallery. Lots of cool stuff there!
Mars is Sublime
Water on the Moon...? Yup. It's real.
Tip o' the dry ice crater to the HiRISE Twitter feed.