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Ringworld - Wikipedia
Will we ever… build ringworlds? - BBC
Why is Larry Niven's Ringworld Unstable? - Physics Stack Exchange
Cosmic Megastructures - Could We Build a Ringworld? - Popular Mechanics
Megastructure - Wikipedia
The Ringworld: A Megastructure of Impossibility and Imagination
Ringworld | THE UNIVERSE OF LARRY NIVEN
"Impossible" Technologies #1: Ringworlds — Trevor B. Williams
Ringworld Theory: Did Teela Brown Have Bad Luck?
Ring theory - Wikipedia