From a report: Facebook today unveiled a project from its secretive Building 8 research group that's working to create a brain-computer interface that lets you type with your thoughts. Regina Dugan, a former director of DARPA and the ex-head of Google's experimental ATAP research group, announced the news today onstage at Facebook's F8 developer conference. Dugan, who now heads up Building 8, says the goal is "something as simple as a yes-no brain click" that could fundamentally change how we interact with and use technology. While it does not exist today outside of very specific medical research trials, Dugan says her team is actively working to make it a reality. Dugan refers to the technology as a "brain mouse for AR," meaning it could be an ideal way to receive direct input from neural activity that would remove the need for augmented reality devices to track hand motions or other body movements. For instance, the Microsoft HoloLens uses hand tracking to let you tap your finger in front of you as if you were clicking a mouse. Facebook's theoretical device could also be used for patients with severe paralysis, acting as a "speech prosthetic" Dugan says.