On January 3, 2004, NASA's Spirit rover landed on Mars! Also known as Mars Exploration Rover 2, this was the first of NASA's twin rovers to land on the Red Planet. The other was named Opportunity. These rovers were designed to last just 90 days on Mars, but Spirit lasted more than six years! It touched down at the Gusev crater, where scientists believed to be an old lake bed that was once filled with water. NASA named the landing site Columbia Memorial Station to honor the astronauts who were killed in the Columbia disaster less than a year earlier.