A NASA spacecraft that has been circling Mars for more than two decades has spotted something it never has before in well over 100,000 orbits of the Red Planet. On a morning horizon in May, the ...

Scientists have discovered a mysterious hole on the surface of Mars, and they have no idea what lies inside it. This pit, ...

NASA's 2001 Mars Odyssey might have concluded its primary mission more than two decades ago, but it's still racking up scientific contributions. On May 2, the orbiter obtained a never-before-seen look ...

Photographs taken by a spacecraft orbiting Mars indicate active volcanoes might exist on the red planet, further eroding its image as a dead world and offering prime sites to prospect for signs of ...

Simulations suggest ancient Martian volcanoes sent steam to the equator, where it froze into buried ice that may still exist and guide future exploration. The authors suggest that these eruptions ...