Did you know that rhinoceros once lived in North America? (and no, we are not talking about the ones found in zoos). Paleontologists have proof of this amazing phenomenon. Listen to Dr. Alison Pearce Stevens as she tells us all about the awesome discovery of over 200 complete skeletons at Ashfall Fossil Beds State Park. These incredible animals lived more than 12 million years ago due to a massive volcanic eruption.