One of James Griesemer’s most important contributions is to have given us a tool for the analysis of research practices and styles, one that allows us to analyze objects as diverse as the work of embryologists in the mid-nineteenth century, the modes of narration in histories of the life sciences, and more recently, the ethnography of elusive and unstable objects such as the Mexican mestizo. That tool is tracking processes, and consists mainly in appreciating what scientists look at (and what they leave out). To understand where it comes from, how it works, and what is the epistemic power of this tool is, we wanted to revisit “Space <=> Time: Temporality and Attention in Iconographies of the Living.” In this lecture, published in 2002, Griesemer discusses where the attention of embryologists is directed by analyzing the ways in which they represent the processes of embryological development in the nineteenth century. A central tenet of the text is that different modes of representation allow for different ways of telling the story of the living. Such narratives have a textual dimension, of course, but also a visual one, as embryologists draw diagrams of the different stages of development and build three-dimensional models.