Which of these transformative inventions was originally developed as a failed cooking experiment while Percy Spencer was testing magnetrons for radar equipment in 1945?

Before becoming ubiquitous household items, some of history's greatest inventions faced significant skepticism or were created for entirely different purposes than we use them for today. This trivia question explores the fascinating origin story behind one of the most transformative innovations of the 20th century. Test your knowledge of product development history and the journey from laboratory curiosity to world-changing technology!

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Microwave Oven
Non-stick Teflon Coating
Post-it Notes
Super Glue