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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
Russians Create Robot Tank Platoons
re: Philip Nowlan w/D. Calkins
(8/15/2025)
3D-Printed Exoskeleton Learns From Your Hand
re: Fritz Leiber
(8/13/2025)
Smartwatch Powered By Slime Mold
re: Philip K. Dick
(7/11/2025)
Unmanned Boats Attack At Sea
re: Ray Naylor
(7/9/2025)
Carpentopod Walking Table
re: Terry Pratchett
(7/7/2025)
Iron Drone Raider Counter-UAV Operations
re: Robert Sheckley
(7/5/2025)
SpaceX Rocket Shuttle Point-To-Point On Earth
re: Robert Heinlein
(7/3/2025)
Quaise Uses Beams Of Energy To Dig Geothermal Wells
re: Frank Stockton
(7/1/2025)
Robots Repair And Modify Themselves
re: Harry Harrison
(6/29/2025)
Waymo And Tesla 'Autonomous Cabs' Are Piloted By Remote Drivers
re: Philip K Dick
(6/27/2025)
Robot Janitors Get To Work
re: Philip K. Dick
(6/25/2025)
Robots Learn To Install Charged Batteries Into Themselves
re: Not known.
(6/23/2025)
Robot Rabbits Entice Pythons
re: JW Groves
(6/21/2025)
LLM 'Cognitive Core' Now Evolving
re: Philip K. Dick
(6/19/2025)
More
SF in the News
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