Annette Joseph-Gabriel talks about black women writers, decolonization, and travel. Joseph-Gabriel is an assistant professor of French and Francophone Studies at the University of Michigan, Ann Arbor. She's the author of Reimagining Liberation: How Black Women Transformed Citizenship in the French Empire.

Sarah Qidwai talks about her research on Sayyid Ahmad Khan as well as her own journey to Mecca and Medina. Qidwai is a Ph.D candidate in the History of Science at the University of Toronto. Her essay "Reexamining Complexity: Sayyid Ahmad Khan's Interpretation of 'Science' in Islam" is in the edited collection Rethinking History, Science and Religion: Exploring Complexity published by the University of Pittsburgh Press.

Richard Read talks about the troubled life of the Coast Guard's sole heavy icebreaker, Polar Star. Read is the Bureau Chief of the Los Angeles Times in Seattle. He is the winner of two Pulitzer prizes for his investigations on the Asian Financial Crisis and abuses by U.S. immigration officials. His article on the Polar Star was published in the August 2nd edition of the Los Angeles Times.

Elizabeth Leane talks about Sidney Jeffryes, radio operator for Douglas Mawson's Australasian Antarctic Expedition in 1913. Jeffryes' struggle with mental illness challenged Mawson's expedition party as well as the way Mawson tried to present his expedition to audiences back home. Leane is a professor of English at the University of Tasmania and an Australian Research Council Future Fellow. She's also the co-author (along with Ben Maddison and Kimberley Norris) of "Beyond the Heroic Stereotype: Sidney Jeffryes and the Mythologising of Australian Antarctic History."

Bathsheba Demuth talks about the history and exploration of the Bering Strait, from the early 1800s to the present day. Demuth is Assistant Professor of History & Environment and Society at Brown University. She's the author of Floating Coast: An Environmental History of the Bering Strait.

Jordan Bimm talks about early experiments in space medicine involving subjects who did not resemble the white male test pilots who would become America's first astronauts. Bimm is a Postdoctoral Research Fellow at Princeton University. He's the author of Anticipating the Astronaut which is under contract to MIT Press, expected in Spring 2021.

Rebecca Priestley talks about her journeys to Antarctica and the process of bringing them to life in her writing. Priestley is an associate professor at the Centre for Science in Society at Victoria University of Wellington in New Zealand. She is the author of Fifteen Million Years in Antarctica which was recently longlisted for the Ockham New Zealand Book Awards.

Dr. Beth Taylor talks about the physiological differences between men and women athletes and why ultra-endurance events seem to offer certain performance advantages to women. Taylor is an associate professor of kinesiology at the University of Connecticut and the Director of Exercise Physiology Research in Cardiology at Hartford Hospital.

Paige Madison talks about recent discoveries at the Liang Bua cave where researchers are trying to understand the complicated story of the hominin Homo Floresiensis. Madison is a PhD candidate in the history of science at Arizona State University where she also works with The Center for Biology and Society and the Institute of Human Origins. She writes about paleoanthropology at the blog Fossil History. She recently wrote about her trip for National Geographic and Scientific American.

Daniel Kennefick talks about resistance to relativity theory in the early twentieth century and the huge challenges that faced British astronomers who wanted to test the theory during the solar eclipse of 1919. Kennefick is an associate professor of physics at the University of Arkansas, Fayetteville. He's the author of No Shadow of Doubt: the 1919 Eclipse that Confirmed Einstein's Theory of Relativity.