Why does NASA keep going back to Mars?
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Ahead of the launch of the Mars 2020 Perseverance rover, NASA's Planetary Science Division Director Lori Glaze explains why the Red Planet is important to explore. [Perseverance rover will use some of the best Martian maps ever made](https://www.space.com/mars-2020-rover-perseverance-best-martian-maps.html)
Credit: NASA
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