Where some chapters in this volume find narrative in the phenomena addressed by scientists, or in their reporting and representational practices, or in their argumentation and reasoning, this chapter finds narrative at the level of field and subfield formation. It does so through the history of historiography and philosophy of history, particularly the work of scholars who have differentiated the many forms of historical knowledge. Focusing on just threethe chronicle, the genealogy and the narrativethe chapter explains how these means for making historical knowledge might be made to cover knowledgemaking in the sciences. The first half of the chapter develops this analytical approach, while the second applies it to the case of synthetic biology. By taking narrative's epistemic significances more seriously we arrive at a new way to explain scientific change over time.