Ray and Dave review the evidence with James Napoli, co-author of the new research paper that resolves the long-standing debate over whether Nanotyrannus represents a distinct species or a juvenile T-Rex.

Ray and Dave talk with vertebrate paleontologist and SVP President Stuart Sumida about sail-backed synapsids, pelycosaurs, and the world before dinosaurs while also diving into his work advising filmmakers and animators on how extinct animals should really move, look, and behave.

Ray and Dave discuss the amazing biota of the Mazon Creek Lagerstätte with Arjan Mann, Assistant Curator of Fossil Fishes & Early Tetrapods at the Field Museum in Chicago, Illinois

Ray gets schooled on the Cretaceous geology around the shores of Kansas Lake Kanopolis by paleontologist Kate Andrzejewski. 

Ray and Dave talk with Smithsonian paleontologist Hans-Dieter Sues about the origins of reptiles, the rise of dinosaurs, and a lifetime unearthing Triassic treasures from around the world.

Ray and Dave explore the mind of paleo artist Doug Henderson exploring his techniques, inspirations, and the breathtaking body of work that re-imagines ancient worlds.

Ray Troll shares morning coffee in his Ketchikan lounge room with Dr. Karin Claeson, exploring fish evolution, anatomy, development, and variability across deep time.

Ray and Dave learn all about Brachiopods, one of the hardy survivors of the Big Five extinctions, with Susan Butts, Director of Collections and Research at the famous Yale Peabody Museum.

Dave goes out on a dig at the famous Egg Mountain site in western Montana with Dr. John Scannella, curator of paleontology at the Museum of the Rockies.

Ray and Dave explore jaws, fins and fossil fish while tracing the deep origins of vertebrate life with Dr. Michael Coates, Vertebrate Paleontologist and Chair of Organismal Biology and Anatomy Professor at the University of Chicago.