Defectors from SpaceX and Blue Origin are developing a remarkable technology called ‘Stargate’ to help colonize other planets

There is no wiggle room once you land on Mars. You either have what you need to survive, or you die.

That risk is dramatically portrayed in the sci-fi book and movie “The Martian,” in which a stranded astronaut survives on leftover potatoes, freeze-dried feces, and a lot of gumption.

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