Did you know that most of our dinosaur fossils were discovered because two grown men absolutely hated each other? It’s true! Rivals! Frenemies Who Changed the World is a riotous audio exclusive, like if Monty Python taught your history class. Each volume of four 30-minute histories will dig into the petty name-calling and grumbling grudges that led to many of the world’s greatest advancements, all delivered with a cheeky sense of humor.