“Fractured Planet: Earth Science and Divided Germany,” German Studies Association Annual Conference, Atlanta, Georgia, September 26-29, 2024.
“Project Plant: Earth Science and the Remaking of Global Order, 1945-1972,” German Historical Institute, Washington, D.C., May 15, 2024.
“Lessons and Legacies from the International Geophysical Year,” International Lunar Year Coordination Group, Washington, D.C., May 6, 2024.
“Environmental Crisis and the Writing of History,” Jimmy and Rosalynn Carter School for Peace and Conflict Resolution, George Mason University, Arlington, Virginia, March 27, 2024.
“Earthbound: A History of the 1957-1958 International Geophysical Year,” Frederick S. Pardee School of Global Studies, Boston University, Boston, Massachusetts, November 17, 2023
“Inventing Planet Earth: A History of the 1957-1958 International Geophysical Year,” John F. Kennedy Institute for North American Studies, Free University Berlin, Berlin, Germany, June 5, 2023.
“Geosciences and the Cold War: Reconsidering a Paradigm,” KTH Royal Institute of Technology, Stockholm, Sweden, June 1, 2023.
“Earth After Empire: Planetary Knowledge and Globalization since 1945,” Institute on the Formation of Knowledge, University of Chicago, Chicago, Illinois, April 24, 2023.
“The Year of the Earth: A Planetary History,” Consortium for the History of Science, Technology, and Medicine (CHSTM), Philadelphia, Pennsylvania, April 10, 2023.
“Reflections on the History of Mennonites and Nazism,” Beechy Peace, Justice, and Reconciliation Lecture, Goshen College, Goshen, Indiana, March 14, 2023.
“Global Environmental History,” George Mason University, February 2, 2023.
“Earth After Lebensraum: Situating Climate Science in Divided Germany,” Central European History Society Presidential Panel, American Historical Association Annual Meeting, Philadelphia, Pennsylvania, January 5–8, 2023.
“On Not Governing the Planet: Earth Science and International Disorder in the Global Cold War,” University of Amsterdam, June 2, 2022.
“Empire and Environment in the Global Cold War,” University of Heidelberg, May 12, 2022.
“The Iron Curtain and the Measure of Earth,” Freiburg Institute for Advanced Study, University of Freiburg, March 21, 2022.
“Mapping after Hitler: German Geodesy, Spaceflight, and the Cold War, 1945-1973,” NASA History Office, Washington, D.C., February 9, 2022.
“Beyond Planetary Consciousness: International Cooperation and Climate Change,” Max Weber Fellows Conference, European University Institute, Florence, Italy, June 16-18, 2021.
“The White Continent: Cold War Antarctica as a Bulwark against Decolonization, 1959-1963,” Sciences Po-LSE Seminar in Contemporary International History, Paris, France, October 21, 2020.
“’We Have Met the Enemy and He Is Us’: Cold War Geophysics and the Roots of Environmental Crisis,” Massachusetts Institute of Technology, Cambridge, Massachusetts, December 6, 2019.
“New Moons: The Space Race Goes Global, 1950-1967,” Smithsonian National Air and Space Museum, Washington, D.C., May 1, 2019.
“The Year of the Earth (1957-1958): Cold War Science and the Making of Planetary Consciousness,” Smithsonian National Air and Space Museum, Washington, D.C., February 11, 2019.
“Making Antarctica Environmental in the Global Cold War, 1950s-1960s,” Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia, November 12, 2018.
“The Year of the Earth (1957-1958): Cold War Science and the Making of Planetary Consciousness,” Laureate Research Program in International History, University of Sydney, Sydney, Australia, October 23, 2018.
“Fixing Germandom: The Nazi Fight Against Mennonite Trans-Racialism, 1930-1945,” German Studies Association, Pittsburgh, Pennsylvania, September 27-30, 2018.
“Mennonite Scholarship in the Third Reich: From Knowledge Production to Genocide,” Mennonites and the Holocaust, North Newton, Kansas, March 16-17, 2018.
“Chosen Nation: Mennonites and Germany in a Global Era,” Indian Institute of Technology Madras, Chennai, India, February 28, 2018
“Religion and Science in Global History,” Universidad Nacional Mayor de San Marcos, Lima, Peru, September 14-15, 2017.
“The Year of the Earth (1957-1958): Cold War Science and the Making of Planetary Consciousness,” American Institute of Physics, August 2, 2017.
“Chosen Nation: Mennonites and Germany in a Global Era,” Harvard Book Store, Cambridge, Massachusetts, May 5, 2017.
“Taube und Hakenkreuz: Verhandlungen zwischen der NS-Regierung und dem Mennonitischen Zentralkomitee in Bezug auf die Chacokolonien,” Symposium on Mennonites and Nazism in Paraguay, Filadelfia, Paraguay, March 10-11, 2017.
“‘Only One Earth’: The Biosphere in Global Thought from the International Geophysical Year to the UN Conference on the Human Environment,” Environment, Society, and the Making of the Modern World, Stockholm, December 14-16, 2016.
“Religious Nationalism in an Age of Globalization: A Case Study,” Lab-Mundi, University of São Paulo, Brazil, March 3-5, 2016.
“Polycentric Peoplehoods: Mennonitism, Germanness, and the Malleability of Modern Nationalism,” German Studies Association, Washington, D.C., October 1-4, 2015.
“Das Völklein und das Volk: Mennoniten und Nationalismus in Deutschland vor 1933,” Conference on Mennonites in the Third Reich, Münster, Germany, September 25-27, 2015.
“Between Activism and Indifference: Religious Nationalism in the Twentieth Century,” Symposium in Honor of Pieter Judson, Swarthmore College, May 20, 2015.