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Mega Structures - (4) MEGASTRUCTURES CATEGORY: STELLAR SCALE ALTERNATE NAMES / SIMILAR STRUCTURES: NIVEN RING Ringworld is an artificial ring in space large enough to maintain an atmosphere and habitable land. The
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Ringworld (Ringworld, #1) by Larry Niven | Goodreads
Ringworld: The Graphic Novel, Part Two
Ringworld (Ringworld, #1) by Larry Niven | Goodreads