"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' dust storms, a new study suggests. When you purchase through links on our ...

The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for ...

Research suggests that an ancient shoreline helped to sculpt the drop between Mars' southern and northern hemispheres.

A mysterious black-and-white striped rock recently spotted on Mars is unlike any seen on the Red Planet before ... 8 inches ...

These rocks might contain chemical fingerprints or organic molecules, fueling speculation about the possibility of ancient microbial life on the planet. Mars' blue rocks, along with dried ...