What was 3M scientist Spencer Silver actually trying to invent when he accidentally created the adhesive later used for Post-it Notes in 1968?

Product design breakthroughs often come from unexpected places! In the world of inventions and discoveries, some of the most successful products emerged from failed experiments or accidental discoveries. The Post-it Note is one such iconic invention that transformed workplace communication and organization worldwide. This trivia question explores the fascinating origin story behind this ubiquitous sticky note that revolutionized how we leave messages and reminders.

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A super-strong adhesive for aerospace applications
A removable bookmark for hymn books
A reusable envelope sealant
A medical bandage that wouldn't damage skin when removed