geological signatures indicate that around 3.4 billion years ago, a connected oceanic system existed on a planetary scale, ...

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

Mars is absolutely dripping with evidence that the red planet was once a striking blue, complete with glistening lakes, ...

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

Evidence of free-flowing water in Mars’s past has been mounting for a long time. River deltas, water-altered minerals, and ...

New research suggests Mars was once a blue planet, as scientists identify river deltas and signs of a vast ancient ocean on ...