What interested me in this was to take a book in which a very extreme situation was presented to a group of people and then to see how this group of people responded to the extreme situation. That’s the only reason we have the badges. That’s what the badges are for, to make sure we have enough CO2 in the air. And “high pressure nervous syndrome” – that turns out to be sudden convulsions, paralysis, and death if the carbon-dioxide content of the atmosphere drops too low. It can happen so fast you don’t realize it until it’s too late and you drop dead. You can quickly become overheated, and just as quickly overchilled. It’s because the helium atmosphere makes body-heat control very volatile. And you know why this habitat constantly adjusts as we walk through it? It’s not because that’s slick and high-tech. You know why the Navy has that rule about pulling people out within seventy-two hours? Because after seventy-two hours, you increase your risk of something called “aseptic bone necrosis.” Nobody knows why, but the pressurized environment causes bone destruction in the leg and hip. Barnes didn’t bother to give us all the gory details. Just leave it at this – we’re in a very dangerous environment. “Reading the details will only upset you.
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