Martin Lockley was Professor Emeritus in the Department of Geography and Environmental Sciences and former director of the Dinosaur Tracks Museum at the University of Colorado Denver and is Associate Curator at the University of Colorado Museum of Natural History. He was the author (with Ryo Morimoto) of How Humanity Came into Being: The Evolution of Consciousness and Dinosaur Tracks and Other Fossil Footprints of Europe. Lockley passed away in 2023. Bernie Spilka is Professor Emeritus in the Department of Psychology at the University of Denver. He is the author (with Ralph W. Hood and Peter C. Hill) of The Psychology of Religion: An Empirical Approach, fifth edition.