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Zippers are everywhere – holding your backpack closed, keeping you snug in your sleeping bag and of course, on your pants! But how exactly does a zipper work? We asked Bryon Robinson of YKK (the world’s largest zipper manufacturer!) to help us find the answer. 

Got a question that you’d like to sink your teeth into? Send it to us at BrainsOn.org/contact, and we’ll help find a fasten-ating answer.