This week, Tour de France riders cranked through three grueling days in the Pyrenees mountains. Once more, they've all made the curious decision not to just get off their bikes and take a bus like sensible people.
Be that as it may, the Alps are still to come, and there's plenty of pedaling to go before they sprint into Paris on July 26.
So, while fans await that triumphant homecoming, there's no better time to turn to know-it-all journalist A.J. Jacobs. He takes NPR's Scott Simon on a tour of their own, talking trivia with a bit of bicycling lore.