posted on Jun, 3 2010 @ 06:21 PM
The Spirit rover on Mars has found rocks that are rich in carbonate minerals.
Carbonates form in water, and this would make it more likely that life in some form was once on Mars.
The rover hasn't found such rocks until now, because a recent modification in the rover made it more able to detect these rocks. They were found in
a large outcropping that was actually visited in 2005. The instruments then were unable to determine the nature of the rocks, though, until now.
[edit on 3/6/2010 by Chamberf=6]