In the latest instalment of the Rhetorical Questions series on "fake news," Lorraine Daston and Peter Galison, experts on the history and philosophy of science, trace the history of objectivity. This podcast takes the listener from the schools of Medieval European philosophy to the penny presses of nineteenth-century America, through to the January 2017 Women's March on Washington. It goes on to ask: Does journalistic objectivity have a future in the era of "fake news?"