Robot dog ran a marathon on one charge and lived to publish the paper

South Korean researchers have published details of how their four-legged robot completed a marathon on a single battery charge – nearly two years after it crossed the finish line. RAIBO2 covered the 42.195 km (26.2 mile) course of the Sangju Dried Persimmon Marathon in November 2024 in 4 hours, 19 minutes, and 52 seconds. As The Register reported at the time, its developers described it as the first quadruped robot to complete a full marathon at an official event.