Alan Robock is a climatologist at Rutgers University and a member of the UN Intergovernmental Panel on Climate Change. His research interests include geoengineering and the climate effects of nuclear winter.

Robin Hanson is an economist at George Mason University, and the author of multiple books, including "The Age of Em" and "The Elephant in the Brain." His blog is called "Overcoming Bias."

Pauline Boss is a professor emeritus at University of Minnesota, a pioneer of the field of ambiguous loss, and the author of numerous books, the most recent of which is called "The Myth of Closure: Ambiguous Loss in a Time of Pandemic."

Rolf Potts is the author of "Vagabonding: An Uncommon Guide to the Art of Long-Term World Travel." His podcast is called "Deviate with Rolf Potts."

Angelo Pentaris is a drummer, disability advocate and motivational speaker.

Robert Gross is a historian at the University of Connecticut and the author of "The Transcendentalists and Their World."

James Fallon is a neuroscientist and professor of psychiatry and human behavior at UC Irvine.

Dean Baker is an economist at the Center for Economic Policy Research. His blog is called "Beat the Press."

Laurence Bergreen is a historian and author of several biographies of famous explorers, including most recently, "In Search of a Kingdom: Francis Drake, Elizabeth I, and the Perilous Birth of the British Empire."

Charles Prebish is a former professor of religious studies, and the author of numerous books including, "American Buddhism."