The Download: understanding AI, and what to expect from the UN's climate conference

We don't know exactly how AI works, or why it works so well. That's a problem: It could lead us to deploy an AI system in a highly sensitive field like medicine without understanding that it could have critical flaws embedded in its workings. A team at Google DeepMind that studies something called mechanistic interpretability has been working on new ways to let us peer under the hood. It recently released a tool to help researchers understand what is happening when AI is generating an output. It's all part of a push to get a better understanding of exactly what is happening inside an AI model.