the.com/altitude
the invisible ladder where air gets stingy and views get expensive
death zoneAbove 8,000 meters your body slowly dies regardless
thin economicsHalf of all air sits below 5.5 km up
cabin trickJets pressurize to roughly 2,400 meters mid-flight
boiling pointWater boils at 71°C atop Everest
high-altitude flushCheeks redden as blood thickens with extra cells