Friendly atmosphere?
The Rover was initially commissioned to last 90 days because the official NASA story is that Mars has no atmosphere, and even if there is something "in the air" there, it must be deadly and dissolving even stainless steel in no time. If this Rover lasted so long there can only one be ONE EXPLANATION to its and its sibling's longevity (apart from good craftsmanship) - THERE MUST BE SOME KIND OF ATMOSPHERE ON MARS THAT SHIELDS AND PROTECTS MAN MADE MACHINES PROBABLY NOT WORSE THAN THE EARTH'S ATMOSPHERE.