There's more evidence that water once flowed on Mars with the discovery of an ancient river delta deep below the surface.
New ground-penetrating radar scans by NASA's Perseverance Rover have revealed an ancient Martian river that may have hosted ...
NASA’s Perseverance rover has detected a buried ancient river delta beneath the surface of Mars’s Jezero Crater using ...
The river delta could be between 3.7 billion and 4.2 billion years old.