Sometimes what you intend to do is not at all what happens. Such is the story for a few big inventions that came about completely by mistake. Most people know that Coca-Cola was intended to be a medicinal remedy and did you know that Charles Goodyear's process for vulcanized rubber was completely random? What very famous food came about as a result of leaving some boiled wheat unattended? What everyday, common household appliance was discovered while trying to figure new military radar systems and the engineer had a candy bar in his pocket? What daily use product came about thanks to a sign that read 'Employees Must Wash Hands'?  The origins of those inventions can be seen in a yahoo.com article that you can read here.