In 2015, Elon Musk founded Neuralink, of which he remains CEO, and announced that the company was working on a “sewing machine–like” device which could implant sensors that are four-to-six micrometers thick (roughly 0.000039 inches, or one-tenth the width of human hair) into the human brain. In April 2021, the company released a video in which a monkey played the game Pong using a wireless Neuralink implant.