Oct 25th 2013, 16:18, by By Heather McPherson, Food Editor
A melted candy bar led to the invention of one of today's most-used kitchen appliances. Percy Spencer was working on a military radar device in the mid-1940s when he noticed that his chocolate snack had gotten soft. Intrigued, he experimented with irradiating some kernels of popcorn, which promptly burst.
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