Tiny Hole In Airplane Windows
Most people panic the first time they notice the tiny hole in the window. The breather hole is a good thing though, it ensures that the pressure inside the cabin stays at a comfortable and safe level as the airplane climbs and the outside pressure drops.
Dimples On Golf Balls
Golf balls aren’t technically round because of the dimples that surround the ball. For many years golf balls were smooth until some savvy golfers realized that older balls with nicks and bumps went further than smooth ones. Hence the newer design with dimples.