Marks on Martian Dunes May Be Tracks of Dry-Ice Sleds
http://www.jpl.nasa.gov/news/news.php?release=2013-200
This is quite interesting…
Mars isn’t quite the dead planet it has been made out to be. Now, in addition to the dust storms (that sometimes cover the _entire_ planet!) and the occasional evidence of recent (less than a few years) water flows, we have dry ice surfing down the slopes. Something else for people to bet on, I am guessing; just the vig on that activity would probably pay for the necessary cameras and whatnot.
The more we learn about our celestial neighbors the more we discover stuff we don’t know about. That is what is cool about science!
