Sophie Scott is fascinated by laughter—and she thinks that cognitive science and psychology are missing out by ignoring it. A cognitive neuroscientist at University College London, Scott studies and teaches us how to distinguish between “social” or “voluntary” laughter (the way you politely laugh at a co-worker’s jokes) and “authentic” or “involuntary” laughter (the kind that causes you to gasp for breath).Chris Gethard, the host of “The Chris Gethard Show” on Fusion and the podcast Beautiful/Anonymous, talks a lot on his shows and in his standup about his own struggles with addiction and depression. He talks with Kurt Andersen about why it’s so important for him to discuss those issues openly, and how mental illness has affected his comedy.Learn more about your ad choices. Visit megaphone.fm/adchoices