🍽️ Microwave oven

📰 With the end of World War II in 1946, the Raytheon engineer was looking for other uses for the magnetron, which generated the microwaves for radar systems. While Percy Spencer was standing next to the device one day, a chocolate bar in his pocket melted. It worked even better on popcorn!

ℹ️ Source: https://www.rd.com/funny-stuff/10-accidental-discoveries-put-to-good-use/