Researchers have developed implants small enough to fit inside brain cells.
Facebook and Neuralink are developing interfaces to link our brains to computers, with serious ethical issues.
BMIs like the ones Neuralink is working on are already used in laboratories around the world as assistive technologies. But melding your mind with an AI is probably not happening anytime soon.
Long read: How nature is fighting our attempts to use biohacking to live forever.
Neuralink is probably a dangerous idea, but to the first person who fell into a firepit, so was fire.
Brain-computer interfacing is a hot topic in the tech world, with Elon Musk's announcement of his new Neuralink startup. Here, researchers separate what's science from what's currently still fiction.