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  1. Ringworld - Wikipedia

  2. Will we ever… build ringworlds? - BBC

  3. Why is Larry Niven's Ringworld Unstable? - Physics Stack Exchange

  4. Cosmic Megastructures - Could We Build a Ringworld? - Popular Mechanics

  5. Megastructure - Wikipedia

  6. The Ringworld: A Megastructure of Impossibility and Imagination

  7. Ringworld | THE UNIVERSE OF LARRY NIVEN

  8. "Impossible" Technologies #1: Ringworlds — Trevor B. Williams

  9. Ringworld Theory: Did Teela Brown Have Bad Luck?

  10. Ring theory - Wikipedia