Curiosity Rover Spots Clear Evidence of Ancient Water on Mars

Imagining Jezero lake

This illustration offers one interpretation for how Jezero Crater looked billions of years ago, filled with water. Illustration: NASA/JPL-Caltech

NASA is fairly certain that Jezero Crater was once filled with water. That would make the river delta that flowed into it a good place to search for signs of ancient microbial life, which may have looked something like the stromatolites that formed on ancient Earth (and still form in some parts of the world today.)

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