Steve Berke is the founder of Elevation Ministries, which operates the International Church of Cannabis in Denver.

Sean O’Callaghan is an associate professor of religion at Salve Regina University in Newport, Rhode Island. He studies New Religious Movements, religiously motivated violence and transhumanism.

Noreen Herzfeld is a professor of theology and computer science at St. John’s University and the College of St. Benedict in Collegeville, Minnesota.

Aubrey de Grey is the co-founder and chief science officer of the SENS Research Foundation, an organization dedicated to the study of radical life extension. He is based in Cambridge, U.K., and Mountain View, Calif.

Stephen Helms Tillery is an associate professor of bioengineering and fellow of the Lincoln Center for Applied Ethics at Arizona State University. He has helped develop cutting-edge technology related to prosthetics, but he’s skeptical that science will ever produce the advancements predicted by transhumanists.

J. Jeanine Thweatt serves on the Christian Transhumanist Association’s academic advisory council. She is the author of Cyborg Selves: A Theological Anthropology of the Posthuman.

Eric Steinhart is a philosophy professor at William Paterson University in Wayne, N.J. He researches and writes about the philosophy of religion, artificial intelligence, robotics and transhumanism.

Felipe Sierra is director of the division of aging biology at the National Institute on Aging.