A new study of Mars' gravitational field has revealed mysterious structures hiding beneath the sediment layers of a lost ocean. Experts still aren't sure what they are or how they formed.

Beneath the surface of Mars, a large hidden ocean that could harbor life was discovered. Scientists used seismic data collected by NASA’s InSight lander to locate the underground reservoir ...

Traces of ancient ocean discovered on Mars Date: October 27, 2022 Source: Penn State Summary: A recently released set of topography maps provides new evidence for an ancient northern ocean on Mars.

Gravity map of Mars. The red circles show prominent volcanoes on Mars and the black circles show impact crates with a diameter larger than a few 100 km.

The findings, published Aug. 12 in Proceedings of the National Academy of Sciences, hint at sufficient water to fill oceans and globally cover Mars to a depth of over a mile (1 to 2 kilometers).

But evaporation, freezing, and rocks can’t quite account for all the water that must have covered Mars in the distant past. Calculations suggest the “missing” water is enough to cover the planet in an ...

NASA's Mars Reconnaissance Orbiter took an image of InSight sitting on the Martian surface on February 2, 2019. The lander was located in a flat plain called Elysium Planitia.

Ancient Mars may have been a beach paradise 4 billion years ago. A new study published in Proceedings of the National Academy of Sciences reports that the Chinese Mars rover Zhurong detected evidence ...

All indications are that Mars had a warmer, watery past, and there have been proposals that included an ocean filling Mars' northern basin. But that has also been subject to debate.

The craters seen here in blue were formed by a meteoroid impact on Mars on Sept. 5, 2021. The impact was the first to be detected by NASA's InSight mission; the image was taken later by NASA's ...