- There's always something new to learn from this podcast that focuses on design and architecture. This was my 'gateway' podcast into the world of Radiotopia... Note: it is "99% Invisible" - pasting the https://99percentinvisible.org/ url, references an incorrect spelling99 Percent Invisible is hosted by the founder of Radiotopia, Roman Mars. It's the original when it comes to design in the real world. From their site: "99% Invisible is about all the thought that goes into the things we don’t think about — the unnoticed architecture and design that shape our world."