Mars rover closes in on biggest crater yet

Those “never say die” robots on Mars — NASA’s Spirit and Opportunity — continue to chalk up science at their respective exploration sites.
Looming large for the Opportunity rover at Meridiani Planum is Victoria Crater — a grand bit of territory that’s roughly half a mile (800 meters) in diameter. That’s about six times wider than Endurance Crater, a feature that the rover previously surveyed for several months in 2004, gathering data on rock layers there that were affected by water of long, long ago.