Geoffrey Hinton, a prominent AI expert, has left Google and is warning about the dangers of AI. He reportedly quit his job to freely speak out about the risks of AI without considering how it might impact Google. Hinton's departure and statements have sparked concerns and debates about the development and potential consequences of AI. The article's portrayal of Hinton's reasons for leaving Google has been disputed by Hinton himself, who claims he left to discuss AI risks without implicating Google.