Shell Worlds and Birch Worlds: The Biggest Megastructures Ever Imagined

Shell Worlds and Birch Worlds are some of the largest megastructures ever imagined, offering a vision of artificial planets that could support civilizations ranging from a single family to trillions of people. From hollow planets filled with hydrogen to colossal Birch Worlds built around supermassive black holes, these concepts push the limits of engineering, physics, and the future of space colonization. In this episode of Entropy Rising, we explore how shell worlds could be constructed, why...