9 Everyday Products You Did Not Know The Use - Page 3 of 9 - 9facts

9 Everyday Products You Did Not Know The Use

#3. The tiny hole in airplane windows

The tiny hole in airplane windows - Things You Did Not Know The Use

It turns out that itsy bitsy 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. 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.  Source

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