Invented by accident when American engineer Percy L. Spencer of the Raytheon Company noticed that a chocolate bar in his pocket melted while he was experimenting with radar tubes (the first food he deliberately cooked this way was popcorn), the microwave may very well be the most influential kitchen invention of the 20th century. The Amana Corporation marketed the first home microwaves in 1967; today 75 percent of American households claim that living without the things would be "almost impossible/pretty difficult."
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