Why do boarding and de-boarding take so long? Why does a plane need multiple engines if it can fly with just one? And is the “black” box really black? An airplane is a complex machine, ingeniously designed to the very last detail. Yet, some things about them still make no sense. Did you know, for example, that you can open the plane bathroom from the outside? Or that pilots fall asleep, and it’s okay? Or that oxygen masks don’t last long? Yup, the safety instructions always tell you how to use them in case of a sudden loss in cabin pressure. But they don't tell you the oxygen in that mask will only last 15 minutes! Let's figure out!

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