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' ...

The area containing the clay-bearing mounds is geologically connected to Oxia Planum, which is where Rosalind Franklin will ...

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

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

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

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

Images of Mars taken from orbit show thousands of mounds in a region sculpted by water billions of years ago. A robotic ...

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

HELENA — The planets are aligned. Six planets, Mars, Jupiter, Uranus, Neptune, Venus and Saturn can be seen in the night sky. You'll need binoculars or a telescope to see Neptune and Uranus but ...