NASA has selected 28 scientists for participation in the 2003 Mars Exploration Rover Mission, including four from the Jet Propulsion Laboratory. The mission consists of two separate, though identical, rovers scheduled for launch in mid-2003 and arrival at separate destinations on Mars in early 2004. The selected proposals were judged to have the best science value among 84 proposals submitted to NASA last December in response to the Mars Exploration Rover Announcement of Opportunity.