Humans in Space
What it actually takes to live off this planet.
Not the render. The life support loop that has to close, the bone that doesn't stop thinning, the radiation nobody has shielded cheaply yet — and the people quietly working on all three.
The beat
Three questions, over and over
Closing the loop
Air, water, food, waste. Every kilogram you don't have to launch is a kilogram of margin. Nobody has closed the loop fully yet, and the reasons why are more interesting than the goal.
Bodies in the wrong gravity
Bone density, fluid shift, vision, immune response, radiation dose. The medical picture of long-duration flight, without the reassuring edit.
The unglamorous constraints
Launch cadence, cost per kilogram, crew psychology, spares. The things that decide whether a plan is a mission or a press release.
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