NPR‘s Invisibilia podcast is back with a third season and so far, it’s as clever and well researched as previous seasons. Invisibilia is about the invisible forces that shape human behaviour – things like ideas, beliefs, assumptions, and emotions. The first two episodes in the new season challenge the way we think about how emotions are made. They haven’t given much more away about what the rest of the season will contain, except to say that all the episodes are connected to this central idea. The hosts are calling it a ‘concept album.’ If you haven’t listened to previous seasons, I urge you to do so. Be prepared to be engrossed from the start.