Ravens plan for future
Scientists from Sweden say ravens are able to think about the future, showing an ability documented only in people and great apes. Researchers Can Kabadayi and Mathias Osvath, of Lund University, tested five captive ravens in two tasks they do not do in the wild: using tools and bartering with humans. The ravens showed they could plan by setting aside a tool that they suspected would get them a tasty treat later. They also prepared for future bartering.