Kind of poor examples there, because a 737 protects passenger against an environment that's pretty close to vacuum in many ways. Outside a 737, it's -50C, a fraction of normal air pressure, higher radiation than ground level (transatlatic flight gives you a dose equal to an X-ray), with an unbreathable atmosphere.![]()
It doesn't protect passengers against cosmic radiation, or temperatures of several thousand above or below zero, or hard vacuum.
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