Jets spend more of their flying time in environments unsuitable for human life. Yes, it’s in our own atmosphere. But you won’t last long in the Flight Levels without oxygen and a heavy set of winter gear.

Many factors contribute, but one thing is clear: you need to know what you’re up against, and how the 777 combats such conditions.

In this clip you’ll see a quick explanation of the atmosphere as it relates to human survivability.

 
 

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