The Curiosity rover has not stumbled onto evidence of an ancient civilization that took the family van to Olympus Mons for vacation, however. The object is simply a rock that the wind has sculpted into an interesting shape, scientists said. "The shiny surface suggests that this rock has a fine grain and is relatively hard," Curiosity scientists wrote Monday (Feb. 11) in an explainer blurb accompanying the image, which was taken on Jan. 30. "Hard, fine-grained rocks can be polished by the wind to form very smooth surfaces."
