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1. TNT - although they later found it very useful as an explosive, it was originally meant to be yellow dye by Joseph Wilbrand in 1867

2. Talking movies (by Thomas Edison) - This idea also started to work later on but was abandoned as a failed invention in 1895.

3. DDT - This was supposed to be the fight against malaria. It was found as a potent pesticide but never got big enough due to high costs and spraying high doses of pesticides each year did not set well with people. This happened in 1873.

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13y ago

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