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.

NASA's plans for Mars sample return are effectively cancelled as part of a bill approved by the U.S. Congress, ending efforts ...

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

The recent detection of potential signs of ancient microbial life on Mars by NASA’s Perseverance rover has sparked renewed interest in the planet’s habitability. The rover’s analysis of a Martian rock ...

Billions of years ago, water flowed across Mars. Most scientists agree the red planet had rivers. But did those rivers flow into an ocean? New research from the University of Arkansas found strong ...

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

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

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

Mars had an Arctic-sized ocean, and scientists are only now beginning to see the outline of it. For a long time, the planet ...

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

F.D. Flam is a Bloomberg Opinion columnist covering science. She is host of the “Follow the Science” podcast.