Neuralink is an American company founded by Elon Musk that is developing implantable brain-computer interfaces (BCI). The company's goal is to implant electrode polymer chips into human brains to connect them directly to machines. This would help people suffering from diseases like paralysis and Parkinson's disease by allowing communication between the brain and external devices. Neuralink plans to develop a small chip that can read thousands of brain signals per second and connect the brain wirelessly to computers to provide benefits like deep brain stimulation and potentially enhance human abilities over time. However, there are also risks like safety and technical hurdles to overcome before this technology can be used widely in humans.