Book 26, Question 2
How did a melted chocolate bar lead to the microwave oven?
Curious, he held popcorn kernels near the machine, and they popped.
In 1945, engineer Percy Spencer was working near a machine that makes microwaves when he noticed the chocolate bar in his pocket had melted. Then he tried an egg, which cooked. Soon his company built the first microwave oven. It was as tall as a grown-up and very heavy.