On this week’s Book Club, I’m joined by the theoretical physicist Carlo Rovelli to talk about his new book Anaximander and the Nature of Science, in which he explains how a radical thinker two and a half millennia ago was the first human to intuit that the earth is floating in space. He tells me how Anaximander’s way of thinking still informs the work scientists do everywhere, how politics shapes scientific progress and how we can navigate the twin threats of religious dogma and postmodern relativism in search of truth.