Engineers use test rover to try out movies to free Spirit from Martian Sand.
Mars Rovers Spirit and Opportunity are 6-wheeled, remotely operated explorers on the planet Mars. Learn more about Mars exploration and how the Spirit and Opportunity rovers are doing.
The United States and Europe are moving closer toward a full-scale collaboration in Mars exploration.
Opportunity finds evidence of water acting at Victoria crater; Mars could have had liquid water and still been cold.