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Photo by Kevin Frayer/Getty Images We Asked an Expert: Are We Really Going to Colonize Mars?
The definitive lowdown on whether we can get there, whether we can stay there—and if either would actually be worth it.
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StockByM; murat4art / Getty Images -
NASA/JPL-Caltech/ASU -
MARK GARLICK/SCIENCE PHOTO LIBRARY/GETTY IMAGES -
Photo via European Space Agency
