The river delta could be between 3.7 billion and 4.2 billion years old.

Nasa's Perseverance rover has detected ancient river delta remains buried deep beneath Mars' Jezero Crater. Using ground-penetrating radar, the rover revealed layered sediments and eroded surfaces, ...

Using ground-penetrating radar, NASA's Perseverance rover has detected underground remains of an ancient river delta on Mars in some of the oldest evidence yet obtained showing how water once flowed ...

NASA's Perseverance rover has detected the underground remains of an ancient river delta on Mars, providing some of the oldest evidence yet that water once flowed across the planet's surface. The ...