In the body of the rover itself will be other instruments, such as a "sniffer" called SAM, for Sample Analysis at Mars, that will used to detect the presence of gases--methane, for instance, could be a sign of liquid water or microbial activity, NASA says.
May 21, 2010 12:16 PM PDT
Photo by: NASA/JPL-Caltech
| Caption by: Jonathan Skillings
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