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Twilight by John W. Campbell:
Science Fiction Inventions, Technology and Ideas
"A story that will set you to dreaming
of purple distances—of a far future
world wherein a race is dying seven
million years away—seven million years!"
"And all the great city-structure
throbbing and humming to the steady,
gentle beat of perfect, deathless machines built more than three million
years before—and never touched since
that time by human hands. And they
go on. The dead city."

('Twilight' by Don Stuart (John W. Campbell).)
Interesting "tale of a stranger" kind of story; this story was originally published under Campbell's pseudonym of Don A. Stuart.
Select
an invention:
Machine City A city that is a self-maintaining whole entity.
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Science
Fiction
in the News
Monolith One Giant Industrial Metal 3D-printer
re: Philip K. Dick
(6/15/2026)
'Mooncrete' Lunar Regolith Concrete (LRC)
re: William Gibson
(6/13/2026)
China's 'Magpie Drone' Ornithopter
re: Greg Bear
(6/11/2026)
MAI-Voice-2 Microsoft Text-To-Speech
re: Nat Schachner
(6/9/2026)
Tumblin' Tumbleweed Rovers To Eplore Mars
re: Clifford Simak
(6/5/2026)
Tentacled Robot Captures Space Debris
re: Makoto Yukimura
(6/3/2026)
Prufrock-MB2 Ready In Nashville
re: Paul Ernst
(6/1/2026)
DIY Robotic Content Farming
re: Schachner and Zagat
(5/29/2026)
Reflect Orbital Sunlight On Demand
re: Theodore Sturgeon
(5/27/2026)
The Amazing Lightfoot Electric Scooter With Solar Assist
re: Robert Heinlein
(5/25/2026)
Fully Electric, Fully Automated Vegetable‑growing Agribots
re: John W. Campbell
(5/23/2026)
Vero Robotic Dog With Vacuum Cleaner Feet
re: Ray Bradbury
(5/21/2026)
AI Operates An Excavator
re: HG Wells
(5/19/2026)
Boy Makes Biomimetic Turtle Robot
re: Poul Anderson
(5/17/2026)
More
SF in the News
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