![Laurels for Living Worlds winner of Best of Earth festival 2021](https://www.calacademy.org/sites/default/files/styles/manual_crop_square_460px/public/assets/images/planetarium/living-worlds_900x900_best-of-earth-laurels-top_211020.jpg?itok=EoP4jbq4&c=c417e56e8cd7aed777dc01e7ee821ee4)
Duration: 3 minutes
Grade Level: Best for grades 5+
Billions of years ago, Mars harbored water on its surface, and water circulated in its atmosphere. Under the martian surface, water likely flowed from the southern highlands to the low-lying northern hemisphere. And where we find water, we can hope to find life.