Veritasium: Why are these 3 letters on almost all of my zippers?

#science #education

Ever peeked at your zipper and wondered why it almost always says "YKK"? This content spills the beans on the fascinating history and mechanics of zippers, from their early invention and how they actually work to why they're called zippers. Most importantly, it dives into why YKK became the ubiquitous name you see everywhere.