Natural Trap Cave is a pit in northern Wyoming into which countless animals have fallen and met their untimely demise since the Pleistocene. Paleontologists today find the cave a treasure trove — a stunning record of the species that have long roamed the area. The mammalian fossils left behind shed light on the climate, food sources and migration patterns of these species from earlier eras. Careful excavation work over the years that has involved sifting for bones, extracting ancient DNA, and looking for prehistoric pollen has revealed not just the plants and animals that once populated this part of the world, but also the ecosystems and climates that governed it. It also has required some rather advanced rappelling skills. In this episode, host Ari Daniel speaks with vertebrate paleontologist Julie Meachen and Smithsonian contributing writer Michael Ray Taylor about what rappelling into Natural Trap Cave reveals about its contents and what it can tell us about Earth’s past. To subscribe to "There’s More to That," and to listen to past episodes about the sex lives of dinosaurs, the numerous archaeological treasures that await beneath the city of Rome, and the science of roadkill, find us on Apple Podcasts, Spotify, iHeartRadio or wherever you get your podcasts. “There’s More to That” is a production of Smithsonian magazine and PRX Productions.  From the magazine, our team is Ari Daniel, Debra Rosenberg and Brian Wolly. From PRX, our team is Jessica Miller, Genevieve Sponsler, Adriana Rosas Rivera, Sandra Lopez Monsalve and Edwin Ochoa. The executive producer of PRX Productions is Jocelyn Gonzales. Fact-checking by Stephanie Abramson. Our music is from APM Music. Episode artwork by Emily Lankiewicz. Photos courtesy of Dr. Susumu Tomiya and public domain.