The gentle curves of an airplane window are not a styling choice but a hard lesson written into aviation history by physics and a series of early tragedies.
Next time you settle into a window seat, run your finger along the edge of the glass. You will feel a soft, rounded curve where you might expect a crisp corner. That curve is doing quiet, constant work. It is one of the most elegant safety features on the entire aircraft, and almost no passenger ever notices it.
Square windows seem like the obvious choice. They are cheaper to cut, easier to
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