New research on Mars sand movement reveals that the largest shifts occur in three distinct regions.

If the newly discovered ice under Mars' north pole melted, it could cover the planet in 5 feet of water.

A strange mineral deposit in the Nili Fossae region of Mars has puzzled scientists, but there's a new explanation for how it got there.

Last year, research indicated there might be water under the south ice cap on Mars. Now, researchers say volcanoes must've been involved.

Built to last 90 days, the Mars rover Opportunity finally ended its mission this week after 15 years. "It was an honorable end..."

"What NASA and other space agencies are concerned about is whether or not the immune system is going to be compromised during very prolonged spaceflight missions."

Six and a half years into its mission on the red planet, scientists are still finding new ways to use NASA's Curiosity rover.

Scientists have debated how Phobos got its strange grooves for 40 years. Now, new research may bring them closer to an answer.

"After it rained, there were only two to four microbe species found in the lagoons. The extinction event was massive."

The high concentration of a particular chemical in the soil on Mars could serve as an energy source for some microbes.