As described by NASA, the above set of images compares rocks seen by the Opportunity rover and the Curiosity rover at two different parts of Mars. On the left is ” Wopmay” rock, in Endurance Crater, Meridiani Planum, as studied by the Opportunity rover. On the right are the rocks of the “Sheepbed” unit in Yellowknife Bay, in Gale Crater, as seen by Curiosity. The rock on the left is formed from sulfate-rich sandstone. Scientists think the particles were in part formed and cemented in the presence of water. They also think the spherical bumps distributed across rock face were formed in the presence of water. Credit: NASA.
A NASA Mars Curiosity rover team member gives an update on developments and status of the planetary exploration mission.