While Elon Musk has been busy taking over Twitter, his brain-computer interface company Neuralink has been working on refining its technology, which is aimed at creating implants that allow a direct line of communication between the human brain and computers. Called brain-computer interfaces, or BCIs for short, these systems use tiny electrodes placed in the brain to "read" signals from nearby neurons. In 2019, Musk claimed his company's device would eventually allow people to achieve a "symbiosis with artificial intelligence." The company, founded in 2016, is still far from merging our brains with AI. In a livestreamed "show and tell" event Wednesday evening, the Neuralink team presented a grab bag of improvements to its technology.