I was reading today that the Mars rover mission has been going on for five whole years!  It really just does not seem that long to me!  The article I was reading was on the BBC.com website, and it was explaining that the original Mars rover mission was expected to last only a few short months, but due to unexpected good fortune the machines have been able to continue to work for five whole years, sending a huge amount of information to Earth about Mars.  I think that is incredible!  I hope they continue to run for many more years, it would be really great to learn as much about Mars as we can!