Why does its southern hemisphere rise significantly above the smoother northern plains? A groundbreaking study using seismic ...

An asteroid that orbited near Earth for a few months as a mini-moon may be a chunk of the moon that was blasted off by an impact thousands of years ago.

Little Friends We've heard of underground parties — but this is ridiculous. A recently released study authored by microbial ...

Thousands of mysterious clay mounds found on Mars were formed by ancient water on the Red Planet's barren northern plains, ...

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

The country's fiery liquid landscape shifts, on a massive scale. By Michael Dumiak Kristín Jóhannsdóttir woke at two in the ...

Ancient ripples suggest a warmer, wetter past for the Red Planet that supported open water on its surface.

CANBERRA -- Australian and Chinese scientists have made a breakthrough in solving the mystery of how the landscape of Mars evolved over billions of years. In a study published on Wednesday, ...

The president’s Inaugural Address linked landing on the Red Planet with Manifest Destiny, but left many of the specifics ...

The mystique of Mars has been studied for centuries. The fourth planet from the sun is reminiscent of a rich, red desert and ...

Mars, the enigmatic Red Planet, has long puzzled scientists with a dramatic geological contrast between its hemispheres, ...

Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...