"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 ...

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

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 building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

Buttes and mesas in Mars' Chryse Planitia contain clay minerals made from liquid water interacting with the rock nearly 4 ...

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

Discoveries of clay minerals in Martian mounds by researchers indicate that Mars once had large bodies of water billions of ...

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

UK researchers have confirmed the existence of a “super Earth” located 20 light-years away that could reveal the existence of ...

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, ...

Experts told Newsweek about the difficulties of reaching Mars as the United States faces complex challenges in space policy.