Mars, now a dusty world of rusted rock and thin air, once carried enough water to transform its face into something far more ...

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very ...

Ancient Mars is coming into sharper focus as a planet laced with rivers, deltas and vast drainage basins, and that new map of its watery past is rapidly reshaping where scientists intend to look for ...

Mars was likely a warmer, wetter place billions of years ago, based on the evidence of ancient lakes, river channels, deltas and rocks altered by water studied by other NASA missions and observed by ...