The Unexpected Innovations of the Slinky and Post-it Notes

While things like the Slinky and the Post-it Note may seem pretty ubiquitous, simple ideas today, they each have their own bizarre accidental origin story. In the second part of this week's two-part series, Ben, Noel and Max dive into the stories of military coil research and a tenacious 3M employee nicknamed "Mr. Persistent."

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