Photo: This full-colour photo of a Martian dune was taken by Curiosity after climbing it on the
538th sol (Martian day) of its activity on the planet. For the scale, the space occupied
by the wheels, from edge to edge, is 9 feet (2.7 meters). The dune measures, at its lowest point, 3 feet (1 meter)
high in the middle of its span in the opening called "Dingo Gap" that the rover had already passed three days earlier. The rover looks
behind it to the east where the barrier of Gale Crater can be seen in the distance. The astromobile, which has
covered 4.97 km since its arrival, has taken this salutary step away from the rocky roads that damaged its wheels in the previous
weeks. It continues westward towards Mount Sharp, whose base is about 5 km away.