The only thing worse than not having a tl;dr is having a clickbait tl;dr: "The answer is simple: to keep that window from killing you". (Translation: "To find

The only thing worse than not having a tl;dr is having a clickbait tl;dr: "The answer is simple: to keep that window from killing you". (Translation: "To find out more, read the article!") The actual claimed explanation: > when an aircraft’s interior is pressurized and de-pressurized repeatedly, over and over again for many months, the strength of that aircraft’s metal body slowly weakens — a phenomenon that became known as metal fatigue. And when the holes you cut into that body to hold windows have sharp corners like squares do, thanks to a process called stress concentration the weakness builds up much faster in those sharp corners than it does elsewhere You can read the rest of the article if you want to read about the history of the de Havilland Comet, the world's first commercial jet airliner.