Looks like Matt Damon really could've grown potatoes on Mars

Looks like The Martian was right about one thing: potatoes can grow on Mars. 
At least, it looks promising according to the results of an experiment by the International Potato Centre (CIP), which is a real thing.
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No, they didn’t fly a potato to space. They put it in a hermetically sealed CubeSat filled with the "most Mars-like soils found on Earth" from a Peruvian desert. Then they mimicked the temperature, air