World War Two spies and an extraordinary naturalist

Sir Max Hastings discusses his new book The Secret War, while Andrea Wulf introduces the life and work of Alexander von Humboldt


Bestselling military historian Sir Max Hastings joins us to discuss his new book The Secret War. Meanwhile, we speak to historian and author Andrea Wulf about Alexander von Humboldt who made great strides in natural sciences in the 18th and 19th centuries.