99% Invisible

Roman Mars made a podcast about design that somehow appeals to people who have never thought about design for a single second. That is the magic of 99% Invisible. The show covers the built world around us: why street signs look the way they do, how a hospital floor plan affects patient recovery, the story behind the flags that cities fly. Design, as Mars frames it, is everywhere you have stopped noticing. With 780 episodes and counting, 99PI has covered an astonishing range of topics since 2010. Episodes typically run 30 to 40 minutes, which is just right for a commute or a walk. Mars has one of the most recognizable voices in podcasting, warm and measured, and the production quality from the team consistently ranks among the best in the industry. The show earns its 4.8-star rating from over 25,000 reviews by being genuinely surprising. You go in thinking you are going to hear about architecture or urban planning, and you come out understanding something deeper about human behavior and the invisible systems that shape daily life. Recent episodes have expanded beyond pure design into related territories like infrastructure, politics, and cultural history. If you have ever walked past a building and wondered why it looks the way it does, or noticed a weird detail on a street corner, this podcast will scratch that itch every single week.