![The Economist Radio (All audio) show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/794/small/the-economist-all-audio.jpg)
Summary: How can artificial intelligence leave the lab and get down to business? Kenneth Cukier explores an innovative method with Tractable founder Alexandre Dalyac. Also, a new way to measure ancient oxygen is changing our understanding of evolution, and we crunch the numbers to reveal the long-term risks of air pollution.