A Walk in the Woods

In 1941, Swiss engineer George de Mestral came home from a walk with his dog, both of them covered in burdock burrs. Annoyed, he put one under a microscope and saw the trick: hundreds of tiny hooks catching on the loops of fabric and fur.

That weed had solved a fastening problem. Years of trial and error later, in 1955, de Mestral patented his copy of it: Velcro, the hook-and-loop fastener born from a seed's way of hitchhiking to new ground.

Velcro now shows up everywhere from sneakers to spacecraft. NASA leaned on it hard, because in zero gravity a dropped tool floats away, but a strip of hook-and-loop holds gear, food pouches, and checklists right where an astronaut left them. Zippers and buttons cannot do that one-handed in a bulky glove.

A single weed's escape plan turned into one of the most versatile fasteners ever made.