Thousands of mounds and hills in Mars' barren northern plains are full of clay minerals, providing evidence that the rocks ...

The new work suggests that the edge of the dichotomy was eroded back by hundreds of kilometers during the time when an ocean might have occupied Mars' northern hemisphere. To view the Martian ...

The European Space Agency’s (ESA) Mars Express orbiter captured stunning views of a winter wonderland on Mars, but this isn’t ...

scientists have revealed Mars as a dynamic, windblown landscape that could—just maybe—harbor microbial life beneath its rusty surface even today. With a radius of 2,106 miles, Mars is the ...

These Martian whirlwinds form, move across the surface and dissipate before others take their ... where dust devils have left ...

From arachnid-like formations and mysterious blobs to an underground ocean and a giant volcano, here are our 10 favorite things scientists discovered on Mars this year.

Snow dots the Martian landscape in these images from ESA's Mars Express orbiter and NASA's Mars Reconnaissance Orbiter.

Mars, once a planet abundant with water, now lies as a barren, arid expanse. Its surface features reveal a history where ...

Some of the more notable debris on Mars includes pieces of the Viking landers, heat shields, pieces of insulation and, more ...

Snow dots the Martian landscape in these images from ESA's Mars ... but a seasonal process brings some of it to the surface. NASA's Mars Reconnaissance Orbiter also saw winter frost lining the ...

The dust is typically found deep beneath the ice, but a seasonal process brings some of it to the surface. NASA's Mars Reconnaissance Orbiter also saw winter frost lining the sides of dunes on Mars.