PASADENA, Calif., May 21 (UPI) -- The U.S. space agency says its Mars rover Opportunity has recorded environmental changes that occurred during billions of years at a Martian crater.
Opportunity surveyed Victoria Crater September 2006 through August 2008. The National Aeronautics and Space Administration said findings from that work reinforce and expand what researchers learned from Opportunity's exploration of two smaller craters after landing on Mars in 2004.