Google has found a business model for its most advanced artificial intelligence

Two years ago, Google spent over half a billion dollars for the tiny artificial intelligence startup DeepMind. Since then, the unit has walloped Atari video games and beaten an impossible board game. But those AI demonstrations have yet to spell actual revenue. Until now -- although the efforts are helping Google save money on its most expensive part. DeepMind chief Demis Hassabis told Bloomberg that his unit recently began applying its advanced AI to Google's data centers, finding ways to reduce the company's sizable energy bill.