Aircraft windows used to be much larger than they are today.

Close up of a tiny hole in an airplane window. Known as breather or bleed holes, these tiny holes help with cabin pressurization and keep the windows clear. Wilbur and Orville Wright—the brothers ...

Known as breather or bleed holes, these tiny holes help with cabin pressurization and keep the windows clear. Wilbur and Orville Wright—the brothers credited with piloting the first successful flight ...

You might be surprised to see large passenger airliners with cockpit windows that open. Here's why some cockpit windows open, ...

The tiny hole in aeroplane windows has a big job, from balancing pressure to preventing condensation at high altitudes.