Mars may have once possessed an ocean at least as large as Earth's Arctic Ocean, a new study suggests. Previous research ...

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

The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too ...

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

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 ...

NASA's Curiosity rover has found evidence of water on ancient Mars with "rippled textures" and "landslide debris" in the ...

Small lakes on ancient Mars may have remained liquid for decades, even with average air temperatures well below freezing.

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 ...

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