The planet Mars is home to thick layers of clay that can span hundreds of feet. Since they need water to form, these outcrops have long been of interest to scientists looking for signs of past life on ...

The thick, mineral-rich layers of clay found on Mars suggest that the Red Planet harbored potentially life-hosting environments for long stretches in the ancient past, a new study suggests. Clays need ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

Scientists have discovered that Mars has an interior structure similar to Earth’s. Results from Nasa’s Insight mission suggest that the red planet has a solid inner core surrounded by a liquid outer ...

A clay-rich mesa in the Hellas basin of Mars. The blue color near the rim is aluminum bearing clays. The red-orange color below that is iron and magnesium bearing clays. The image captures an area ...