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"I share the view of Pythagoras that the world is number. The ultimate substrate of the universe is math. There's no way to test that - it's pure metaphysical speculation."
- Bart Kosko

Foot Loops  
  Hold yourself down in zero gravity situations with this low-tech device.  

I can't think of an earlier example of this idea or phrase in print.

Jimmy Cardigan and Harlowe, staring through the darkside port, had their feet in the foot-loops which proved their usefulness in the first rocket ever to coast with its power off.
Technovelgy from The Power Planet, by Murray Leinster.
Published by Amazing Stories in 1931
Additional resources -

NASA's SpaceHab modules, part of the International Space Station, feature foot loops.


(Foot loops (foot restraints) on Spacehab)

Here's another sample of this simple idea, from Mirusha (2001) by Geoffrey A. Landis:

“Hi, Ryan,” he said.

“Radkowski,” Ryan said. He was wearing a tee-shirt that read, “High Energy Physicists Have A Strange Charm.” He floated with the tip of one foot hooked under a loop to keep him from drifting av'ay. He was oriented sideways to Radkowski’ s local veitical; it didn’t seem to bother him, although Radkowski still had troubles adapting to it.

Compare to the hand grips from Islands in Space (1932) by John W. Campbell.

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Additional resources:
  More Ideas and Technology from The Power Planet
  More Ideas and Technology by Murray Leinster
  Tech news articles related to The Power Planet
  Tech news articles related to works by Murray Leinster

Foot Loops-related news articles:
  - Taikonaut Tai Chi Foot Loops

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Crystalline Structures In Space, You Say?
Amazing Photonic Crystal Light Sail
The New Habitable Zones Include Asimov's Ribbon Worlds
Will Space Stations Have Large Interior Spaces Again?

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