Propagandist by Murray Leinster:
Science Fiction Inventions, Technology and Ideas

Wonderful story about a dog who brings the suspicious adults of two different solar systems together. It's really too bad that this story is available only in out-of-print collections. Select an invention:

Planet-Smasher
Devices capable of destroying an entire planet.

Psychoscanner
A device capable of taking impressions, feelings and memories from living brains; it can be used on animals as well.

Synchrophased Power Beams
Focuses energy beams from multiple planets on the same object.

Wango Wave - sign of hyperspace
Energy surge that accompanies the entrance into, and exit from, overdrive outside of normal space.

 

Technovelgy.com is devoted to the creative inventions of science fiction authors and movie makers. Look for the Science Fiction Invention Category that interests you, the Glossary of Science Fiction Inventions, the Timeline of Science Fiction Inventions, or see what's New.
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Science Fiction
in the News

The New Habitable Zones Include Asimov's Ribbon Worlds
re: Harl VIncent
(1/23/2026)

3D Printing A 12-Meter Boat Hull
re: Murray Leinster
(1/15/2026)

China Still Working On Rescue Robot That Eats People
re: Various
(1/13/2026)

Lawyer AIs Create Chaos In Our Legal System
re: David Brin
(1/11/2026)

Chinese Hospital Tries Vonnegut's 'Harrison Bergeron' Cosplay
re: Kurt Vonnegut
(1/9/2026)

Robot Clerks Become A Reality In China
re: Miriam Allen deFord
(1/7/2026)

Can One Robot Do Many Tasks?
re: Robert Sheckley
(1/5/2026)

Atlas Robot Makes Uncomfortable Movements
re: James Cameron
(1/3/2026)

Boring Company Drills Asimov's Single Vehicle Tunnels
re: Isaac Asimov
(1/1/2026)

Humanoid Robots Tickle The Ivories
re: Herbert Goldstone
(12/29/2025)

A Remarkable Coincidence
re: Arthur C. Clarke
(12/27/2025)

Cortex 1 - Today A Warehouse, Tomorrow A Calculator Planet
re: Clifford Simak
(12/25/2025)

Perching Ambush Drones
re: Philip K. Dick
(12/23/2025)

Leader-Follower Autonomous Vehicle Technology
re: Gordon R. Dickson
(12/21/2025)

More SF in the News
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