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Excerpted from NOVA: "Finding Life Beyond Earth." Third party materials courtesy of NASA, NASA/JPL, Prime Focus, NASA/NSSDC, ESA, NASA/JPL/University of Arizona, and NASA/JPL-Caltech.
- What evidence on Mars suggests that water once flowed on the surface?
- How does water ice behave on Mars and why?
- Could life exist on Mars without liquid water on the surface? Why?