What failed experiment at 3M eventually led to the invention of Post-it Notes in the 1970s?

Product innovations often come from unexpected places and moments of serendipity. The journey from laboratory accident to marketplace success can transform how we live and work. This trivia question explores one of the most famous accidental discoveries that revolutionized organization and communication in offices worldwide. Test your knowledge about this sticky situation that turned into a billion-dollar product line!

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An attempt to create a super-strong adhesive that accidentally produced a weak, pressure-sensitive one instead
A heat-resistant coating experiment that unexpectedly created a paper that could be written on and erased multiple times
A waterproof paper test that resulted in paper that wouldn't accept ink except in specific temperature conditions
A color-changing dye project that inadvertently produced yellow squares that glowed under office lighting