Airplane Window Holes
On the plane, there is a hole in the window. There’s no need to be concerned. As the plane climbs higher, the breather hole allows the outer panes to tolerate the pressure difference. The cabin would not be secure or comfortable without it. Furthermore, if something is wrong, an air leak will occur.

Airplane Window Holes
Black Grating In The Microwave
Take a moment to enjoy the black grating on the microwave door! This is the Faraday shield, which keeps the electromagnetic forces inside the oven from escaping. It protects you from harm while also cooking your food. It’s possible that it’s the world’s most underrated thing.

Black Grating In The Microwave