A sad story that comes to us from the Detroit Zoo proves that we humans don’t know nearly enough about wild animals, even when we think we have their best interests at heart. A female Polar Bear named Anana who is 20, who’d garnered many admirers during her stay at the Cincinnati Zoo, is dead, after she was killed by a potential mate16 years old. Anana was moved to the zoo in Detroit in January as part of a program to encourage breeding among members of endangered species. The hope was that Anana would mate with a male Polar Bear named Nuka. We’re told that Nuka had successfully mated with other bears in the past and that there was no hint of any trouble between the 2 before Nuka killed Anana. Researchers do know much more than they once did about why wild animals do what they do, but there is obviously still a lot more that we need to learn. That’s the way I see it.