Earth’s Extinctions: Past And Future

Earth has endured five mass extinctions due to extreme heat, cold, asteroids and other factors. Science journalist Peter Brannen joins us to talk about the common threads that run through these disasters – and about what they can tell us about our future. His new book is called “The Ends of the World: Volcanic Apocalypses, Lethal Oceans, and Our Quest to Understand Earth’s Past Mass Extinctions” (Ecco).