The Perseverance rover, which landed on Mars in February 2021, has so far collected 11 samples as part of its hunt for signatures of ancient life.
Lockheed Martin nets NASA deal
The company will make a rocket to bring back rocks from Mars.
River delta bolsters search for life on Mars
The study in Science analysed high-resolution images captured by Perseverance of the cliffs that were once the banks of the delta.
