Airplane windows are good for more than just snapping photos from 30,000 feet.
As this video from Real Engineering explains, round airplane windows are actually a major safety innovation that keeps planes from disintegrating mid-flight.
SEE ALSO: Inventor pitches detachable airplane cabin to save lives during crashes
The history of the round airplane window descended from — as most great aviation innovations do — fuel efficiency. As commercial travel became more popular, airplanes started flying at higher altitudes to avoid turbulence and drag.
Image: http://mashable.com
