Dr. Travis S. Taylor heads up the cast of The Secret of Skinwalker Ranch and can be seen on The Machines that Built America on the History Channel. He has worked on various programs for the Department of Defense and NASA for the past twenty years. His expertise includes advanced propulsion concepts, very large space telescopes, space-based beamed-energy systems, future combat technologies, and next-generation space launch concepts. Taylor is also the author of pulse-pounding, cutting-edge science fiction novels, including the highly popular One Day on Mars, Tau Ceti Agenda, and the groundbreaking Warp Speed series. He is a regular on the History Channel’s Life After People and The Universe series.

Les Johnson is a futurist, author, and NASA technologist. Publishers Weekly noted that “The spirit of Arthur C. Clarke and his contemporaries is alive and well . . .” when describing his novel, Mission to Methone. His most recent novels, The Spacetime War and Saving Proxima (with coauthor Travis S. Taylor), were published in 2021. In his day job at NASA, Les is the Chief Technologist at the Marshall Space Flight Center where he leads the center’s development of next-generation space technologies—including solar sails, which he believes will eventually take us to the stars.