For decades, scientists have had better maps of the Moon and Mars than of Earth’s own ocean floor. But thanks to NASA’s ...

These findings also help support the theory that Mars once had a massive ocean. "The structures don't look like sand ... As the rover moved, it used a process known as ground penetrating radar (GPR) ...

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

A team of Chinese and foreign scientists has discovered underground sedimentary layers on Mars that appear to have been shaped by oceanic activity, providing new evidence that water once existed at ...

The data from Zhurong, however, suggest Mars once had oceans and beaches similar to those found on Earth, according to a recent study. The Chinese rover, the country’s first surface venture ...

The discovery, they say, is the strongest evidence yet that Mars's northern lowlands once sported an ocean that covered a third of the planet's surface—and which could have provided a habitable ...

Subsurface data from Mars suggests the planet may have once featured oceans and beaches similar to Earth’s, according to a new study published in Proceedings of the National Academy of Sciences.

Mars – dusty, dry, and desert-clad – was once so rich in water it had not just lakes, but oceans, according to a new study. Observations using ground-penetrating radar have revealed ...

What Lies Beneath Mars’ Surface On Earth, ocean tides and winds carry sediment toward the shoreline ... As the rover moved, it used a process known as ground penetrating radar (GPR) to map up to about ...