NASA is on a journey to Mars, with a goal of sending humans to the Red Planet in the 2030s. That journey is already well underway.
There is more to learn as we expand humanity's presence into the solar system: Was Mars once home to microbial life or is it today? Can it be a safe home for humans? What can the Red Planet teach us about our own planet's past, present and future?
Only time will tell.
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