Departing from her own backyard, Emily kicks off her trip in Episode 1, “Welcome to Fossil Country.” She travels to the Medicine Bow Mountains of southern Wyoming to get a closer look at the clues left behind by 2.5 billion-year-old prehistoric bacteria. Throughout her trip, she meets some other early forms of life, from small fish to the soaring sauropod dinosaurs. Emily chats with experts who study how fossils form and how animals of the past left traces we can still see today.