In the foothills of a Martian mountain, NASA’s Curiosity rover found stunning new evidence of an ancient lake in the form of rocks etched with the ripples of waves — and the telltale signs appeared in an unlikely place. NASA orbiter captures image of a bear's face on Mars Specifically, the rocks were discovered in what’s called the Marker Band Valley, a zigzag formation of rocks that stands out against the landscape, thanks to its darker coloring. But scientists are hoping the vehicle will stumble on some softer spots more conducive to sample collection as its trek continues