interesting Martian image
If you look about 1/3 of the way down the image there is a channel that starts on a cliff and winds its way down to the bottom. This looks to me like it would have to be from water, any other possibilities?
http://barsoom.msss.com/moc_gallery/r03_r09/images/R04/R0400160.html
http://barsoom.msss.com/moc_gallery/r03_r09/full_jpg_non_map/R04/R0400160.jpg
