Oct 16, 2014 | 44:45The Nature of Things Gorilla Doctors VideoClosed Captions availableThe Nature of Things Gorilla Doctors Oct 16, 2014 | 44:45How did Canadian veterinarian Dr. Mike Cranfield end up making house calls for Africa's endangered mountain gorillas? The Gorilla Doctors perform check-ups, give medicines, and sometimes operate. But how much should the vets intervene with a wild population? Is this radical human intervention going too far?