18 Inventions Promoted at World Fairs That Flopped
Not every invention unveiled at a world fair went on to change the world — many disappeared almost instantly.
Failed inventions
15 Failed Inventions That Made Headlines
Every era brings its share of inventions that promise to change the world. Some succeed, while others become cautionary tales of bold ideas that could not quite deliver.
20 Failed Inventions That Were Surprisingly Popular
Many inventions became popular for a short time but later proved impractical or failed completely.