Spirit and Opportunity
It will be 6 years on January 4th when the first rover landed on Mars followed by the second on the 25th of January. Spirt and Opportunity were originally slated for a 90 day operation each. I cannot believe and I am certain that all the engineers that worked on the original design probably cannot believe that these land rovers are still in operation after all these years. How does a remote vehicle designed for a maximum 90 day operation running on a temporary battery and solar panels still operate after all these years? Spirit has travelled 7.7 Kilometers and Opportunity has travelled 18.9 Kilometers. This does not seem like a long distance in almost 6 years but I can just imagine how much science has been completed within this short distance travelled. It was less than 2 months after the first landing that one of the rovers discovered that water was present on Mars at one point. After almost 6 years there has not been any evidence found of previously living organisms as far as I kno...