Microwave oven - discovered by a guy whose chocolate bar melted in his pants - the Awesome World of Things
Percy Spencer was working with a magnetron which is used in radar equipment when he became aware that there was a strange feeling in his pants. He discovered that a chocolate bar in his pants pocket had started to melt. He deduced that the microwave radiation of the magnetron caused the chocolate to melt and so was born the microwave oven.
Read more about the microwave oven on LinkedIn here.