Microwave ovens were invented by accident. Percy Spencer was standing in front of an active radar set when he noticed the candy bar he had in his pocket had melted.

The third most serious nuclear accident ever recorded, the Kyshtym disaster in Soviet Russia, was not informed to populations of affected areas for a week. The world only found out years later.

Alfred Nobel, of the Nobel Prize, lost his brother to an accident at his lab. They were working with liquid nitrogen and attempting to create a more stable explosive. Nobel was able to complete his research after the accident and invented dynamite.