Mark Zuckerberg has confirmed that Facebook is working on technology that will allow people to directly send their thoughts over the internet.
The Facebook founder, who has hinted at mind-reading technology in the past, said the company was hard at work at creating "direct brain interfaces".
He made the announcement at F8, Facebook's developer conference, at which Zuckerberg unveiled a host of new augmented reality (AR) technologies that let users superimpose digital objects on the real world using a smartphone camera.
However, he said the company was already looking beyond technologies like AR. "We're building further out beyond augmented reality, and that includes work around direct brain interfaces that are going to eventually one day let you communicate using only your mind," Zuckerberg said
He admitted that "that stuff is really far out", but said Facebook would reveal more details of what it is working on on Wednesday.
Regina Dugan, who left Google last year to work on advanced technologies last year, is due to speak at F8 on Wednesday evening. She leads a mysterious division inside Facebook called Building 8, which earlier this year advertised for PhD-level roles for jobs such as "brain-computer interface engineer" and "neural imaging engineer".