Ann Barrett, Danielle Froio,

Michelle Richardson

Astronaut
Imagine a place so remote and harsh it is anathema to life. Imagine a multiyear journey to that place during which your sustenance has to be carried with you, perhaps complemented by caches left behind by previous travelers. That place is Mars. And the National Aeronautics and Space Administration (NASA) is planning to go there.

Sending astronauts to Mars involves not only the challenge of transporting them there and safely home, but also the equally immense problem of sustaining crews for the d…

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