A team of researchers at Japan's Keio university have built a robotic tail. Dubbed'Arque', the grey one-metre device mimics tails such as those of cheetahs and monkeys, used to keep balance while running and climbing

If you've been to the RoboGames, you've seen everything from flame-throwing battlebots to androids that play soccer. But robo-athletes are more than just performers. Researchers at the University of Electro-Communications in Tokyo and the Okinawa Institute of Science and Technology have built a small humanoid robot that plays baseball -- or something like it. The bot can hold a fan-like bat and take swings at flying plastic balls, and though it may miss at first, it can learn with each new pitch and adjust its swing accordingly. Eventually, it will make contact. The robot, you see, is also equipped with an artificial brain.