If you're interested in how grasslands and the animals that live in them have evolved together over millions of years, Nebraska is one of the best places in the world to visit. One of the reasons that we know as much as we do about this evolutionary epic are the many volcanoes upwind of Nebraska. Join me and Dr. Nick Famoso as we discuss how eruptions and the ash they emit help us understand the age of the Great Plains and, in one very remarkable case, captured and preserved a single moment in time.