Dave Rearick circumnavigated the globe, and is the author of Spirit of a Dream: A Sailor's Ultimate Journey Around the World Alone.

Michael Joyce is a novelist, poet, critic and the author of works of electronic literature, including afternoon, a story.

Milan Ćirković is a professor at the Astronomical Observatory of Belgrade, and the author of The Great Silence: Science and Philosophy of Fermi's Paradox.

Robert L. Kelly is an archaeologist at the University of Wyoming, and the author of several books including The Fifth Beginning: What Six Million Years of Human History Can Tell Us about Our Future.

Andrew Walder is a political sociologist at Stanford, and the author of several books on Mao and the Cultural Revolution. His latest book is Civil War in Guangxi: The Cultural Revolution on China's Southern Periphery.

The podcast now has a Patreon! Available here: https://www.patreon.com/dunctank

Matt Simon is a writer at Wired Magazine, and the author of A Poison Like No Other: How Microplastics Corrupted Our Planet and Our Bodies.

Warren Motte is a professor of French and Comparative Literature at the University of Colorado Boulder. He is the author of several books, and an editor of Oulipo: A Primer of Potential Literature.

Robert Beachy is a history professor at Yonsei University and the author of Gay Berlin: Birthplace of a Modern Identity.

Malcolm Harris is a journalist and author of several books. His most recent work is Palo Alto: A History of California, Capitalism and the World.

Derrick Jensen is an author and environmentalist. He is the author of several books, including The Myth of Human Supremacy.