Teenager builds advanced robot hand entirely from Lego pieces Jared Lepora, a student at Bristol Grammar School, UK, began developing the hand when he was 14 with his father, Nathan Lepora, who works at the University of Bristol. The four-fingered robotic hand can push, pull and grip with almost as much force as a leading 3D-printed hand. The hand is driven by two motors using tendons, and each of its four fingers has three joints. A differential made from Lego clutch gears links the digits so t

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