Microwaves are a ubiquitous kitchen appliance in most households across America. In 1945, engineer Percy Spencer accidentally discovered the heating effect of microwaves. While working on an active radar set, he noticed that a chocolate candy bar started melting in his pocket. The microwaves in the radar had melted his chocolate. Spencer successfully experimented with microwaving different foods, including popcorn and eggs, before developing a commercial microwave in 1947, which was six-feet tall and weighed 750 pounds. Although they've been around for more than half a century, there are still misconceptions about microwaves. Our friends at BuzzFeed dispelled some of the myths with this helpful two-minute video.