It turns out that itsybitsy hole in the bottom of your airplane window is actually a very important
safety feature. It's all-too-easy to let your mind wander when you're
confined to a tiny box of space while hurtling 40,000 feet in the air at
hundreds of miles per hour, but rest assured: every single window on the
airplane has the same hole. More officially, it's called a breather hole and
it's used to regulate the amount of pressure that passes between the window's
inner and outer panes. In short, the system ensures that the outer pane bears
the most pressure so that if there were a situation that caused added strain
on the window, it's the outside panel that gives out (meaning you can still
breathe).   The breather hole also keeps the window fog-free by
wicking moisture that gets stuck between the panes. After all, half the fun
of an airplane ride is the in-flight scenery shots. Mystery solved. Erika
Owen is the Audience Engagement Editor at Travel + Leisure.  Follow
her on Twitter and Instagram at @erikaraeowen. Turns
out there's a very important safety reason for the holes in airplane
windows. Read about it here.

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