Futureproof Extra: Tenacious Beasts

Despite being in an environmental and biodiversity crisis, there are a number of animals that have come to the brink of extinction. So what can we learn from them, and are we being optimistic by thinking we can bring more species back? Joining Jonathan is Dr. Christopher Preston, Environmental Philosophy Professor at the University of Montana and author of 'Tenacious Beasts: Wildlife Recoveries That Change How We Think about Animals'.