Popcorn is an ancient snack -- humans have been eating it for thousands of years. Here's a short video showing the history of popcorn, explaining how and why it pops, and showing what popcorn looks like under a microscope (tasty!). Enjoy:

For more mental_floss coverage of popcorn, check out: Why Does Popcorn Pop?; Why Do Your Dog's Feet Smell Like Popcorn?; and Dietribes: Pop! Goes The Corn.