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

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

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) ...

Scientists have uncovered compelling evidence suggesting Mars once hosted an ancient ocean. Data from China’s Zhurong rover ... Since NASA’s Mariner 9 orbiter captured images of water-sculpted ...

Viking’s images showcased what ... at the edge of an ancient ocean, it suggests a prolonged period of stable liquid water, which has major implications for Mars’ climate history,” McNeil ...

The radar images showed thick layers of ... The polar ice caps do not contain enough water to fill such an ocean. Subsequent missions to Mars, however, provided evidence that, while a lot of ...

so may have been contemporaries of a martian ocean.” At this point it’s clear that Mars was once a very, very wet world, but whether that liquid water supported any life on the planet’s ...

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

Step aside, Santa Monica. It seems that Mars once had beaches that would give the Californian coast a run for its money.

The ripples suggest that the lake was free of ice at one point.

Mars may once have held enough water to fill oceans and form coastlines. The planet’s red dust contains water and likely formed in cold conditions.