Watch This Before You Eat Another M&M

M&M's were likely one of the first candies you tried as a child, and you probably still enjoy them just as much today. Like most popular candies, they have a very simple origin but have expanded to include all kinds of flavors today. They were first invented in the early 1940s, but regular citizens couldn't get their hands on them until the end of the decade, because they were originally only given to soldiers. The tiny candies that didn't melt were ideal for rations, but they quickly became a mainstream favorite. Here's what you should know before you eat another M&M.