NASA's Opportunity rover snaps photo of Martian dust devil

A photo snapped by Opportunity Friday (April 1) shows the six-wheeled robot's tracks in the foreground and a Martian twister off in the distance, perhaps giving viewers the impression that the rover is in full retreat from a tornado. But Opportunity is not making a run for it. For one thing, the twister is a dust devil, not a true tornado of the type that can wreak havoc here on Earth. And with a top speed of just 0.1 mph (0.16 km/h) -- and a minimum 8-minute round-trip communication delay between Opportunity and its handlers -- fleeing is never really an option for the rover. So, the newly released image is just a nice, and fortuitously captured, tableau of the Red Planet's 14-mile-wide (22 km) Endeavour Crater.