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

Mars today is a frozen, dusty desert. But if you look deep inside Valles Marineris, the largest canyon system on Mars and in ...

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

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

NASA’s Mars Reconnaissance Orbiter (MRO) has provided new high-resolution images of Candor Chasma, a massive canyon within Mars’ Valles Marineris. These images, captured by the HiRISE camera and ...

A high-resolution morphometric analysis of the southeastern region of Coprates Chasma, part of the extensive canyon system of Valles Marineris on planet Mars, has made it possible to identify sediment ...

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

WASHINGTON -- Water roaring out of an overfilled lake carved an instant Grand Canyon -- a valley more than a mile deep -- on the surface of Mars some 3.5 billion years ago, according to a new analysis ...

Searching for water on Mars often feels like chasing a flicker of hope in a cold and quiet world. You read about dried riverbeds, ancient lakes, and canyons carved by water that vanished long ago. So ...

We were as excited as anyone when MARSIS (the Mars Advanced Radar for Subsurface and Ionosphere Sounding) experiment announced there was possibly liquid water under the southern polar ice cap. If ...

Mars, once thought too cold and dry for liquid water, may briefly host salty brines twice a day during certain seasons. These fleeting bursts wouldn’t be enough to sustain humans, but they could have ...