![The Economist: Babbage show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/034/980/small/the-economist-babbage.jpg)
Summary: We are joined by Martin Sweeney, co-founder of Ravelin, to explain how artificial intelligence is being used to stop fraud. Our environment correspondent discusses climate-change scepticism in America. Also, a long-standing bet about the underpinnings of the universe needs to be settled