When the cabin goes dark before takeoff and the crew asks you to lift the window shades, it isn’t about mood lighting — it’s a quiet piece of safety engineering built around the human eye.
The cabin lights drop a notch, the engines settle into a low hum, and a flight attendant walks the aisle asking everyone to slide their window shades up. Most passengers barely register the moment. It feels like routine theater, the airline equivalent of a deep breath before the run down the runway. But the dimming is
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