Neuralink says it may have fixed its brain implant problem

Neuralink has published an update on the second patient in its early human trials, and it said that "promisingly," it has "observed no thread retraction" in the participant. The Elon Musk-led startup implants a chip into the human brain, allowing paralyzed patients to control devices, browse the internet and play video games with their thoughts. It implanted a chip into its first patient back in January, and while the procedure went well, some of the implants' connective threads retracted from the brain weeks later. That reduced the brain signals the device could receive. For its second patient called Alex, the company employed mitigation measures to prevent the same thing from happening, or at least lower its probability.