Images: Lakes on Titan, water on Mars?

Evidence of water on Mars? NASA describes the "Tectonic fractures within the Candor Chasma region of Valles Marineris, Mars, retain ridge-like shapes as the surrounding bedrock erodes away. This points to past episodes of fluid alteration along the fractures and reveals clues into past fluid flow and geochemical conditions below the surface. "

This view from the High Resolution Imaging Science Experiment camera on NASA's Mars Reconnaissance Orbiter shows an area of about 1 kilometer across.