Tech billionaire Elon Musk is starting another company called Neuralink, which will specialize in developing implantable brain chips. Musk is the brain behind the all-electric car Tesla and the private space exploration company SpaceX. Neuralink will work on implanting tiny electrodes to treat brain disorders like epilepsy and depression. Rudimentary electrodes are already being used to treat Parkinson's disease. But Musk envisions these implants one day being used in healthy people's brains to combat what he sees as the potentially dangerous rise of artificial intelligence.