A dog invented velcro.
Swiss engineer George de Mestral
was out for a hunting trip with his pooch,
and noticed the annoying tendency of burrs to stick to its fur
(and his socks).
Later, looking under a microscope, Mestral observed
the tiny "hooks"
that stuck burrs to fabrics and furs.
Mestral experimented for years with a variety of textiles before arriving at the newly invented nylon—though it wasn't until two decades later that NASA's fondness for velcro popularized the tech.
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