In The Martian, fictional astronaut and consummate wiseacre Mark Watney survives being stranded on the red planet by growing potatoes in the Martian soil, extending his usual rations well past their expected usefulness. But in the real world, there have been concerns over using Mars's soil to grow food, due to there being a great deal more heavy elements found in it, as compared to what's found in typical Earth dirt. However, a new study from the Netherlands appears to show that Watney may have been on to something.
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