Mars today is a frozen, dusty desert. But if you look deep inside Valles Marineris, the largest canyon system on Mars and in ...

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 underground ...

Recent discoveries suggest the presence of a hidden ocean beneath Mars’ surface, sparking excitement about the possibility of life on the Red Planet. The prospect of water existing in liquid form ...

A study using radar data from China's now-dead Zhurong rover finds strong evidence that Mars had a stable ocean in the ancient past. Scientists have used orbiters and rovers to find dried streams, ...

Mars may have been a prime vacation spot millions of years ago, according to a new study on its coastal deposits. The data came from China’s Zhurong rover, which landed on the Red Planet on May 14, ...

In the 1970s, images from the NASA Mariner 9 orbiter revealed water-sculpted surfaces on Mars. This settled the once-controversial question of whether water ever rippled over the red planet. Since ...

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very similar to classic river deltas on Earth. These are traces of rivers that ...

A hypothetical picture of Mars 3.6 billion years ago, when an ocean may have covered nearly half the planet. The blue areas show the depth of the ocean filled to the shoreline level of the ancient, ...

FAYETTEVILLE, Ark. — Researchers at the University of Arkansas have recently discovered geological formations on Mars that suggest the past presence of large rivers that once flowed into an ocean.