Matthew R. Bennett is a geoscience professor from the United Kingdom. He is one of the world’s leading authorities on vertebrate ichnology (the study of fossilized trackways), and he is the author of Our Dynamic Earth: A Primer.

David Bustos is the integrated resource-program manager at White Sands National Park, where he has investigated ancient human and megafauna footprints throughout the park for more than a decade.

Daniel Odess is an archaeologist with extensive experience conducting research in Alaska, northern Canada, and arctic Russia. He is a coeditor of Honoring Our Elders: A History of Eastern Arctic Archaeology.