chocolate bar melting in his pocket · All Facts

chocolate bar melting in his pocket
The microwave oven was invented by accident when engineer Percy Spencer noticed a chocolate bar melting in his pocket near radar equipment.
SrcSmithsonian

Next evidence →2,000-year-old clay jarsThe first batteries were possibly 2,000-year-old clay jars found near Baghdad — called "Baghdad Batteries" — though their purpose is debated.

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