A look at O’Neill Cylinders, immense space habitats. Visit our sponsor, Brilliant: https://brilliant.org/IsaacArthur/
Far larger than any conventional Space Station, O’Neill Cylinders could potentially serve as as entire city-states or nature preserves. This video will review how these megastructures might be built and how they may represent a superior option to terraforming planets.
Contributed by Tom Tolan