We tend to think of the world in terms of our relationship with it: as individuals, communities, civilizations. It’s harder to think about the Earth before a textual record, before human history. This week, we dive into deep time with paleoclimatologist Page Chamberlain. What did the Western United States look like in the Cenozoic Era? How do the Rocky Mountains affect Europe’s climate? How can the climate 3 million years ago tell us about the climate today? In this conversation, Page and producer Mike Osborne banter about these and other questions surrounding Earth systems of the past.