In this episode of "Stuff You Should Know," Josh and Chuck delve into the history, science, and cultural significance of popcorn. They discuss popcorn's origins in the Americas, its unique popping mechanism due to its non-porous hull and internal water content, and its evolution from a Native American staple to a global snack. The hosts explore the commercialization of popcorn, including early brands like Jolly Time and Cracker Jacks, and its rise in popularity alongside the advent of movie theaters. They also touch on the nutritional aspects of popcorn, various cooking methods, and its potential as an eco-friendly packaging material, ending with listener mail about the show's music bumpers.