Ten years ago today (January 24, 2004), the NASA Mars rover named Opportunity landed on Mars. It's mission, to search for evidence of water, was intended to last for only 90 days. To this day, that rover is still operating and in relatively good shape, having traveled more than 24 miles in it's lifetime to date. And it seems unlikely the mission will be ending anytime soon.
I have to say, that is quite impressive.
