In this episode of "Stuff You Should Know," hosts Josh Clark and Chuck Bryan dive deep into the world of porcupines. They discuss the key differences between Old World and New World porcupines, exploring their unique traits, defense strategies, reproductive habits, habitats, and conservation efforts. The conversation touches on their dietary requirements, mating difficulties, and encounters with predators, especially the dangers posed by dogs. The episode concludes with listener interactions that add to the vibrant discussion about these fascinating animals.