Will and Mango get serious about novelty songs, learning: why there was a Golden Age of this unique music; how the Monster Mash got invented; who was really doing the kung-fu when "everyone" was kung fu fighting; and why a song about Itsy-Bitsy, Teeny-Weeny, Yellow Polka Dot Bikinis isn't what you think it is. Plus: Will and Mango reveal two shocking truths about The Purple People Eater.

Is Recycling Worth the Hassle?
42:45

9 Nutty Facts About Hard-Shelled Fruit
27:49

How Clean Should We Be?
40:47