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"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 ...

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

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

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.

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

New research suggests that ancient Mars might have experienced alternating hot and cold periods, enabling it to retain liquid ...

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

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