The Microwave: Invented By Mistake
Something that we use everyday was actually invented by mistake! Percy Spencer was a scientist in the USA. One day he was working on a machine that used sound. It got so hot where he worked that his chocolate bar melted. He had an idea for a machine that could make food hot faster than other machines. He built the machine in 1945 and it was later called Radarange. It is now called microwave and people use them all over the world. This shows us that mistakes are not always not a bad thing.
Question:
What was made accidentally by Percy Spencer?