It was a busy November for the McDonnell Initiative. First, at the Philosophy of Science Association (PSA) Annual Meeting from November 11-14, McDonnell Working Group Leaders Drew Inkpen, Lucie Laplane, and Kate MacCord discussed regeneration at different biological scales, delivering the session affiliated with the International Society for the History, Philosophy, and Social Studies of Biology (ISHPSSB). McDonnell Co-PI Jane Maienschein pulled the session together with a talk called, “What is Regeneration in Biology, How Do We Know, and Why Should We Care?” PSA had been scheduled to take place in Baltimore, MD, but due to COVID-19 was run as a hybrid meeting. Second, at the History of Science Society (HSS) Annual Meeting from November 18-21, Working Group Leaders Kathryn Maxson Jones, Kate MacCord, and Frederick Davis presented a session organized by Maxson Jones, “Regeneration as a Boundary Concept: Dialogues between Basic and Applied Biology in the Long Twentieth Century.” Jane Maienschein chaired and commented. The HSS meeting had been planned to take place in New Orleans, LA but moved to a fully-online platform. Both the PSA and HSS sessions were well-received.