How do creatures with no lungs or red blood cells become the most successful biomass on Earth? In this episode, Dr. Hollister Horvold from the American Museum of Natural History reveals the hidden internal world of insects. We dive into the research process of using high-resolution CT scanning to map out the "distributed respiratory systems" of over a million species.

We also explore a fascinating career path pivot—how a software engineer of 15 years transitioned into a leading researcher in invertebrate zoology. From the 300-million-year-old "griffin flies" of the Carboniferous period to the unique "ramen-shaped" tracheal structures of modern leaf insects, this episode explores the evolutionary blueprints that allowed insects to take to the skies 100 million years before the first birds.