The popsicle, super glue, teflon, post-it notes and the microwave oven are some of the things that were discovered with a bit of luck.
Here are 10 accidental discoveries that generated great wealth.
By the same token here are some inventions that flopped:
![](http://l.yimg.com/a/i/ww/news/2011/05/09/inventors.jpg)
Edison's cement piano and Da Vinci's giant crossbow are inventions that never quite took off.
Also:
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