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

Three billion years ago, you could have stood on Mars and watched a river spill into a sea. That picture is still speculative ...

Data collected by China’s Zhurong rover has provided new evidence that Mars may once have hosted large oceans. Subsurface ...

Thin, seasonal ice may have protected ancient lakes on Mars, allowing liquid water to last for decades despite cold ...

A study by scientists at Penn State and NASA shows that intact biomolecules from dormant microbes break down much more slowly ...

Scientists have traced ancient Martian shorelines inside a giant canyon, revealing where a vast ocean once stood and why ...

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

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

Learn how researchers were able to use a climate model to uncover information about water on ancient Mars.

New climate modeling suggests that small lakes on ancient Mars could have stayed liquid for decades, even in a generally cold environment. Small lakes on early Mars may have stayed in liquid form for ...

For more than a century, astronomers debated the possibility of martian canali (channels) which Italian astronomer Giovanni Schiaparelli claimed to see on the Red Planet in 1877. Mistranslated into ...