New evidence of ancient rivers suggests Mars may have been a "blue planet," thanks to an ocean spanning its entire northern ...

Ancient shoreline features hint that water on Mars once formed a vast ocean.

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

"The structures that we were able to identify in the images are clearly the mouth of a river into an ocean." The post ...

Led by the University of Bern, the study involved investing Valles Marineris, the largest canyon system on Mars.

Researchers worked out the ocean's size by finding how high the water level got in the Solar System’s largest canyon system.

'Because the ice is thin and temporary, it would leave little evidence behind, which could explain why rovers have not found ...

Bright white rocks spotted by NASA’s Perseverance rover are rewriting what we thought we knew about ancient Mars. These ...

NASA’s Curiosity rover has photographed a bizarre, coral-shaped rock on Mars, believed to have formed billions of years ago. The image, taken in July 2023, captures a formation just an inch wide but ...

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very similar to classic river deltas on Earth. These are traces of rivers that ...

The recent announcement that scientists have spotted what they believe to be evidence suggesting ancient life on Mars seemed like the latest in an endless cycle of tantalizing hints followed by pleas ...