What these Antarctic penguins tell us about climate change

Ron Naveen used to be a lawyer for the EPA, but he left government in the 1980s to start Oceanites, a nonprofit that tracks the health of penguins that breed on the Antarctic Peninsula. Now, that 800-mile stretch of land is warming faster than almost anywhere else in the world, and the changing climate is affecting the "glorious creatures" Naveen studies. William Brangham reports from Antarctica.