![The Economist: Babbage show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/034/980/small/the-economist-babbage.jpg)
Summary: Brain scans of American footballers reveal the darker side of contact sports and a new study on social media uncovers why we take selfies
Summary: Brain scans of American footballers reveal the darker side of contact sports and a new study on social media uncovers why we take selfies