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 ...

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

"Rootless cones form when lava flows over wet or icy ground, causing it to boil and explode," said Dundas. "The region around ...

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

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

The northern plains of Mars, marked by thousands of mounds and hills, hold significant evidence of the planet's watery past.

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

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

Trump says we're going to Mars. He may be making it harder to get there. President Donald Trump says we’re going to Mars, but ...

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