The Mars Express orbiter has kept an eye on an elongated cloud above Arsia Mons volcano for the last few years. The cloud is reoccurring, grows incredibly fast and is "made up of water ice," according ...

"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact." ...

Data from the Mars Express orbiter has been used to create a visualization of "a vast system of deep and steep valleys that ...

A massive meteor strike on Mars sent shockwaves across the planet, revealing that some of its tremors weren’t tectonic but ...

Incredibly powerful marsquakes that violently shake the red planet don't always begin under the surface, research shows.

A mysterious square formation on Mars has caught the attention of SpaceX founder Elon Musk, who expressed his desire to ...

For the first time in human exploration of Mars, the presence of a stable, subterranean body of salty (briny) water has been strongly suggested by data returned by the European Space Agency’s ...

CaSSIS on ESA’s Trace Gas Orbiter, and the High-Resolution Stereo Camera on Mars Express. While many of these events were believed to be tectonic, new findings suggest they may actually be the ...

A perfectly square-shaped structure on Mars, 3 kilometers wide, spotted in NASAs Mars Orbiter Camera images has sparked ...