“The risk of fatality will be high,” Musk conceded in the course of describing SpaceX’s absurdly ambitious (and still preliminary) plan to establish a human colony on Mars. “There’s no way around it.”

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SpaceX plans to build a “self-sustaining city” on Mars, according to its founder Elon Musk. But, while we now know a lot more about how SpaceX plans to get to Mars, details about how people will actually survive up there remain sketchy

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