The Mars Exploration Rovers, Spirit and Opportunity, are marking their second anniversaries on Mars. Spirit landed on Jan. 3, 2004. Opportunity landed Jan. 24, 2004. This narrated slide show features images selected by members of the the rover team.
In January 2004, Mars had two new visitors. The Mars Exploration Rovers, Spirit and Opportunity, were about to begin an amazing year of exploration. Look back at their scientific adventures and discoveries, and stay tuned as the rovers welcome a brand new year on Mars.
