Connecting the human brain to computers is quickly becoming one of the hottest ideas in Silicon Valley, with Tesla's Elon Musk and Facebook's Mark Zuckerberg among the many top tech entrepreneurs leading the charge. In March, Musk launched Neuralink, a medical research company that creates brain-computer interfaces (BCIs). Musk has previously expressed the importance of upgrading human cognition in order to ensure people are not made obsolete by artificial intelligence. BCIs would initially be used for medical research, with the ultimate goal being to blur the lines between people and artificial intelligence. Read: Will Robots Take Your Job? Elon Musk Thinks We Have 30 Years Until AI Is Better Than Us At Everything Neuralink has been registered as a medical research company, and Musk said they will produce a product to help people with severe brain injuries within four years, the Washington Post reports.