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Space Checklist As you might suspect, there’s a fairly long safety checklist for sending humans into space. The more obvious items, like a functional spacecraft to get them there and spacesuits to keep them protected once they arrive. There are also practical considerations like stocking up on space-friendly food, tools that can perform in zero-gravity, and the means to communicate with Earth. NASA and the other space agencies that oversee missions thoroughly train, prepare, and equip their astronauts for spaceflight, but there’s one area that hasn’t been given much thought — primarily because, up until quite recently, extended stays in space hadn’t seemed imminent. Astronauts face a number of considerable health ris…

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