Scientists are confident Mars was once abundant with water, as seen in massive flood-carved channels, ancient river valleys, ...

Researchers examining seismic data recorded on Mars say the have found evidence supporting the presence of liquid water deep ...

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

New seismic evidence hints at liquid water deep beneath Mars’ surface, strengthening the case for the planet’s ability to ...

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 ...

Until now, only about a quarter of the seafloor has been mapped using ships with special sonar equipment. The rest has ...

According to the paper's Chinese and American authors, beaches imply a large, ice-free ocean on Mars, even though Mars is too cold today for water to flow as a liquid. They also imply that there ...

"Hence the 'follow the water' theme of Mars exploration," he told the outlet. "Most exciting to me was the chance to look beneath the surface at a place we think there could have been an ocean and ...

"We found evidence for wind, waves, no shortage of sand—a proper, vacation-style beach," said geologist Benjamin Cardenas.

It’s thought that the earliest life on Earth began at locations like this, near the interface of air and shallow water.” The “Mars ocean theory” has long been the topic of discussion among ...