Despite lacking moving plates, the Red planet's magmatic systems may have run for thousands of kilometers.

For years, Mars has sat in an awkward middle ground, too geologically quiet to look like Earth. At the same time, it is too ...

Despite its dry, dusty surface and thinner atmosphere, Mars may have more in common with Earth than scientists previously thought. In a new study, researchers at the University of Rochester—including ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. And yet, new research reveals the extent to which Mars is quietly tugging on Earth’s orbit and shaping ...

Was Mars a friendly planet for water, even life, in its ancient past? Huge channel networks run across its surface. Rocks show signs of water immersion. Yet pictures sent back from NASA's Curiosity ...