Name: Hoopy Explains What the Tiny Hole in an Aeroplane Window Is For
Uploaded: 2026-07-16
Description: That pinhole in every plane window isn't a flaw. It's a pressure-management trick called a bleed hole that keeps the glass strong and the view fog-free at 35,000 feet.

Hoopy Explains Why a Soccer Ball Bends
Hoopy Explains How a Spirit Level Works
Hoopy Explains How a Mousetrap Snaps