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

Mars’s Coloe Fossae reveals a landscape shaped by ancient ice ages, with deep valleys, cratered terrain, and frozen debris flows preserved from a time when the planet’s climate dramatically shifted.

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

Mars is known for its barren desert landscape and dry climate. But two recent studies go beneath the surface: They explore the interior of the red planet using seismic data from NASA's InSight mission ...

NASA’s Mars Reconnaissance Orbiter (MRO) has made a historic leap in its mission to understand the Red Planet. With its HiRISE camera now having captured its 100,000th image, this milestone provides ...

It’s a virtual mission to Mars. Our first mission to Mars may still be a ways off, but people can take a virtual tour of the Red Planet thanks to a brand new video by the Mars Express Orbiter. People ...

In a mission update late last month, Perseverance team members described the rover's most detailed look yet at a class of features called aeolian megaripples, oversized ripples of sand that can rise ...