Researchers have found new evidence for a massive subsurface ocean on Mars, highlighting the possibility of microbial life ...

NASA’s InSight lander recorded surprisingly large quakes that indicate Mars is more seismically active than we first thought.

Seismic readings of the interior of Mars strongly suggest large quantities of water buried 6 to 12 miles underground.

Mars might hold enough subsurface water to cover its surface in a global ocean between 0.62 to 1.24 miles (1 to 2 kilometers) ...

More than 3 billion years ago, Mars intermittently had liquid water on its surface. After the planet lost much of its ...

Scientists have identified another possible commonality between Earth and Mars: a solid inner core. Scientists have ...

Water once existed in abundance of at the surface of Mars. How much of that water has been stored in the planet's crust is still unclear, according to a new analysis.

Research published late last year indicated “seismic discontinuities in the Martian crust” that scientists believe could be an indicator of liquid water under the Martian surface, raising the ...

These studies show that Mars is bombarded by meteorites far more often than previously thought — about 2.5 times more ...

The north pole of Mars is slowly sinking under the weight of an ice cap that only formed within the past few million years. And, in the process, it's telling us something about what the planet's ...

Fluid-rock interactions on ancient Mars may have produced abundant magnetic minerals that preserved unusually intense records ...