South Africa may kill wild elephants in the Kruger National Park because of concern that the animals are breeding too fast. The elephant population there may reach 20,000 by 2012, the Environment and Tourism Ministry said. But animal rights groups say the shootings will cause trauma and will disrupt elephant society. The news report mentions a Web site at Wayne State University in Detroit that indicates elephants demonstrate advanced social behavior, such as covering dead animals with leaves and twigs and staying by the body for days.