Mars has lost immense amounts of water over it lifetime, and scientists aren't sure exactly how. New research hints that the ...

Mars may have once hosted an ocean with waves that lapped against sandy beaches 3.6 billion years ago, according to new research. China’s Zhurong rover and its ground-penetrating radar detected ...

The new images by the Curiosity rover on Mars show "dramatic evidence" of ancient groundwater in crisscrossing low ridges, ...

Enough water to cover the surface of Mars in an ocean between one and two kilometers (0.62 and 1.24 miles) deep has been discovered within the crust of the Red Planet by NASA's InSight mission ...

(Image credit: SCIEPRO/SCIENCE PHOTO LIBRARY via Getty Images) Geophysicists have discovered a gigantic hidden ocean beneath Mars ' surface, and they say it could harbor life.

Mars may be drenched beneath its surface, with enough water hiding in the cracks of underground rocks to form a global ocean, new research suggests.

Seismic analysis of data from NASA’s InSight lander could be a remnant of Mars’ watery past and raise prospects for life below Mars’ surface.

Researchers have identified what they believe could be oceans' worth of water on Mars. There's just one snag: it's deep underground.

The “Mars ocean theory” has long been the topic of discussion among scientists and cartographers due to Mars’s geography, which suggests a large northern ocean once existed on its surface.

China's Zhurong rover offers new evidence from ground-penetrating radar that Mars once had a large stable ocean in the northern lowlands.

China’s Zhurong rover used ground-penetrating radar to find signs of beaches beneath Mars’ surface, adding evidence to the idea the planet hosted an ancient ocean.