While the science in The Martian is solid, there is one obstacle Mark Watney rarely had to cope with – his own body.

During his two years alone on the Red Planet, Mark Watney never fell sick. He never had to splint his own bones or pass a kidney stone, never suffered a bout of insomnia or depression, never got cancer. But real astronauts traveling to Mars could face all of these unpleasantries and more.
That’s why NASA has tasked a small army of biomedical researchers with studying how the human body and mind are impacted by long stints in space. Gizmodo spoke with the experts to learn about the biggest health risks facing our astronauts, and what we can do to mitigate them.

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Image Credit:     NASA

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