Put on your thinking cap: it’s Professor Brian Cox. We travel the galaxies of chit-chat — from black holes and cage dancing to a thousand Einsteins and the building blocks of space and time. “You can’t make progress if you think you know everything.” Our thoughts exactly. Welcome to SmartLess. Subscribe to SiriusXM Podcasts+ to listen to new episodes of SmartLess ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus (https://siriusxm.com/podcastsplus) .