Which accidental discovery led to the development of 'scarcity marketing' as a significant consumer behavior strategy?

Throughout history, many revolutionary products weren't intentionally created for their eventual use. These 'accidental inventions' often led to dramatic shifts in consumer behavior and marketing strategies. This trivia question explores how one such discovery transformed consumer psychology and created entirely new marketing approaches. Test your knowledge about the intersection of invention, product adoption, and the resulting consumer behavior shift!

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Post-it Notes, when a 3M scientist created a weak adhesive that could be repeatedly reused
Champagne, when monk Dom Pérignon's 'mistake' of secondary fermentation created bubbles in wine
Microwave ovens, after Percy Spencer noticed a chocolate bar melting near radar equipment
Teflon, discovered when Roy Plunkett was experimenting with refrigerants