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Researchers at the University of Pittsburgh have successfully implanted a device in a monkey, giving it control to move a mechanical arm with its brain. This technology could assist disabled people and help them to live a normal life. Oscar Pistorius uses carbon fiber-composite legs and is one of the fastest athletes in the world. He wanted to participate in the Beijing Olympics but was rejected because the bionic prosthetics apparently gave him an advantage over normal athletes. This poses one ethical issue if bionics become mainstream. People might decide to get rid of their human legs and replace them with these for an advantage.