Science works through collaborations and yet our epistemology—how we gain and secure knowledge—is fundamentally tied to the thinking, perceiving, and acting individual. How should we understand the epistemology of collaborations, from a handful of scientists working at a lab bench to a 2500-person strong team at CERN? What is the knowing subject of a group working together? Who is, who can be responsible for the robustness of the result? From questions of credit to the security of the claims, collaborations present a host of problems for historical-philosophical understanding. The course will read about the history and sociology of collective work from the Invisible College of the 17th century through the philosophical literature on the "expanded mind" (beyond skin and skull). We will look for parallels in the collective cognition of bee hives, flocking birds and artificial intelligence, all the way forward to work on the frontiers of contemporary science.