Evidence of water
Many of the rocks in the far field of view have a distinctly rounded
appearance. Now the only reasonable way that these rocks could have become
rounded is if they were carried along by water over a long distance, in
effect, stream-washed boulders. This is the first time we've seen these
kind of boulders; we didn't see them at Viking. This is a very exciting
discovery here at the Ares-Tiu landing site.
Ron Greeley video
Ron Greeley audio