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."

CLASSIC: The Prussian King Friedrich Wilhelm I Tried To Make An Army of Super Tall Soldiers
34:06

CLASSIC: Playboy, Progressive Politics and Stand-up: The Dick Gregory Story, with Wayne Federman
50:23

The Ridiculous Racist Origin of Tipping, Part Two: The Great Debate and Anti-tipping Crusades
42:52