A polar bear considered to be the last in Africa has died at a South African zoo, a couple of months after his long-time mate passed away. “Africa's last polar bear Wang must be put down because of liver and heart failure,” Johannesburg Zoo said in a statement on Wednesday. The bear, considered 28-years-old, stumbled on Johannesburg in 1986, as part of a conservation exchange program with a zoo in Japan. In 2010, Wang was identified as having liver ailments.
