Devolution? Keio University team designs wearable robotic tail to help elderly keep their balance

Millions of years after the ancestors of humans evolved to lose their tails, researchers at Keio University have built a robotic one they say could help unsteady elderly people keep their balance. Dubbed Arque, the gray 1-meter device mimics tails that cheetahs and other animals use to keep their balance while running and climbing, the Keio team says. "The tail keeps balance like a pendulum," said Junichi Nabeshima, a graduate student and researcher at the university's Embodied Media Project, demonstrating the robotic device attached to his waist with a harness. "When humans tilt their body one way, the tail moves in the opposite direction." As Japan grays, it is leading the industrial world in seeking ways to keep its aging population mobile and productive.