I doubt any of us ever really think about airplane windows, maybe not beyond wondering how to frame them in that mid-flight Instagram picture. But changing the shape of those windows from squares to ...

People notice many things while flying, but one small detail always makes passengers curious. If you’ve ever taken a window seat, you may have spotted a tiny hole at the bottom of the airplane window.

I doubt any of us ever really think about airplane windows, maybe not beyond wondering how to frame them in that mid-flight Instagram picture. But changing the shape of those windows from squares to ...