Andrew Graham-Dixon takes a look at the many ways in which drawing has connected us with the natural world and also how it has helped advance scientific enquiry, from the Italian Renaissance right through to today. In this first edition, he meets a surgeon whose study of Leonardo da Vinci’s drawings of the heart has led him to develop a radical new form of cardiac operation, uncovers a remarkable 200 year-old series of drawings of the moon, and encounters some of the actual preserved birds drawn by the great American ornithologist John James Audubon.