Tech billionaire Elon Musk is announcing a new venture called Neuralink focused on linking brains to computers. The company plans to develop brain implants that can treat neural disorders - and that may one day be powerful enough to put humanity on a more even footing with possible future superintelligent computers, according to a Wall Street Journal report citing unnamed sources. Musk, a founder of both the electric-car company Tesla Motors and the private space-exploration firm SpaceX, has become an outspoken doomsayer about the threat artificial intelligence might one day pose to the human race. Continued growth in AI cognitive capabilities, he and like-minded critics suggest, could lead to machines that can outthink and outmaneuver humans with whom they might have little in common. In a tweet Tuesday, Musk gave few details beyond confirming Neuralink's name and tersely noting the "existential risk" of failing to pursue direct brain-interface work. Some neuroscientists and futurists, however, caution against making overly broad claims for neural interfaces.