Planets are a historical accident. Ring worlds are what you build once you understand physics well enough to stop settling for spheres. In this episode of Entropy Rising, we break down rotating space habitats from the near term to the absurdly large. We start with practical designs like Stanford tori and early ring stations, then scale up through Bishop rings and Banks orbitals, all the way to full Niven style ring worlds that rival planetary orbits. We dig into how spin gravity actually work...