Gullies seen to form on Mars BBC

The formation of gullies has been seen for the first time on Mars. According to University of Melbourne geologist Dr Nick Hoffman, gullies near the Red Planet’s south pole form as the seasonal ice cap retreats in the Martian spring. “In itself the observation of active flows is a dramatic discovery since no movement has yet been seen on Mars, except for some dry dust avalanches,” he told BBC News Online.