The Enlightenment Expedition That Reshaped Our World

Hour 2: Who first determined the true shape of the planet and how was it done? We’ll talk this hour with science writer Larrie D. Ferreiro, who tells the story of the early 18th Century Geodesic Mission in his new book “Measure of the Earth: The Enlightenment Expedition That Reshaped Our World” (Basic Books, 2011).