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

The fact that the cold, dry Mars of today had flowing rivers and lakes several billion years ago has puzzled scientists for decades. Now, researchers think they have a good explanation for a warmer, ...

Mars' southern hemisphere absorbs a lot of the sun's energy during the Red Planet's spring, and that may be causing Mars' ...

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

The car-sized Curiosity rover has spotted evidence of once quite hospitable environs on Mars.

Harvard scientists explain how Mars had warm spells billions of years ago, allowing rivers and lakes to exist.

Scientists confirm the existence of liquid water on Mars, altering our understanding of the Red Planet. Evidence of wave ...

Formations that look like jumbo-sized kidney beans (or blobs of chocolate syrup, depending on your palette) may be indicators ...

The 3.7-billion-year-old formations in the planet's Gale Crater suggest the presence of long-gone bodies of liquid water, ...

Caltech scientists published a study using NASA Curiosity rover imagery showing the past existence of warm water on Mars.

The next logical progression to space exploration would be sending people to Mars, but there are challenges to this, such as ...