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Made for Mars

Big Picture Science

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The Pros and Cons of Exploring Mars

We try to be as prepared as we can, but surprises are always part of the picture when it comes to exploration. Having people on the surface there is really a good thing because they can do things that the robots can never do. They can follow up on geological formations that suggest there's some evidence for life on the red planet. But after about four years, you really have to come back because the cumulative radiation that you've been exposed to there on the Martian surface is getting very dangerous.

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