Mars's water disappeared somewhere, but scientists have been disagreeing for years about where exactly it went.

Mars' strange gullies are not carved by water as once thought. New research shows sand and seasonal carbon dioxide ice are ...

Add Yahoo as a preferred source to see more of our stories on Google. New experiments have shown that the core of Mars formed much faster than Earth's core, thanks to molten iron and nickel sulfides ...

The observation of small gullies on Mars was one of the more unexpected discoveries of the Mars Observer Camera (MOC) aboard the Mars Global Surveyor spacecraft. The characteristics of these gullies ...

Due to extreme temperatures and the dryness of Mars, it’s thought to be impossible for liquid water to form on the planet’s surface, a critical precondition for habitability. The only hope of finding ...

High-resolution photos of lava flows on Mars reveal coiling spiral patterns that resemble snail or nautilus shells. Such patterns have been found in a few locations on Earth, but never before on Mars.

New experiments have shown that the core of Mars formed much faster than Earth's core, thanks to molten iron and nickel sulfides seeping down through solid rock and into the center of the Red Planet.