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Five years after this image was taken by Spirit in 2005, NASA scientists concluded that this area showed a past that was wet and non-acidic and could potentially sustain life as we know it. The rocks were identified as magnesium iron carbonate with a 10x higher concentration of carbonate that ever seen on Mars. NASA say "Carbonates originate in wet, near-neutral conditions, but dissolve in acid."
A look at Husband Hill, the 269-foot peak climbed by Spirit.
The view from the top of Husband Hill.