The spine of the continent: the most ambitious wildlife conservation project ever undertaken

pt. 1. America's next best idea. Bear with me ; They paved paradise ; Reptile brain ; The disappearance ; A science of love and death ; The real work ; Triple crown

pt. 2. Cores, carnivores, and corridors on the spine. Leave it to beaver ; Holy cow ; Not hunting ; Take it from the top ; Wolf sign ; Borderline ; There ought to be a law

pt. 3. Congratulations, you've won climate change. Picka pika ; Eyes in the sky ; Welcome home.