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"Cyberspace is a metaphor that allows us to grasp this place where since about the time of the second world war we've increasingly done so many of the things that we think of as civilization."
- William Gibson

Lux  
  A bar of solidified light.  

“Either that,” returned Arcot, “or proof of an amazing degree of technological advancement. It's only a guess, of course—but I have an idea where this kind of matter exists in the solar system. I think you have already seen it—in the gaseous state. You remember, of course, that the Kaxorians had great reservoirs for storing light-energy in a bound state in their giant planes. They had bound light, light held by the gravitational attraction for itself, after condensing it in their apparatus, but they had what amounted to a gas—gaseous light. Now suppose that someone makes a light condenser even more powerful than the one the Kaxorians used, a condenser that forces the light so close to itself, increases its density, till the photons hold each other permanently, and the substance becomes solid. It will be matter, matter made of light—light matter—and let us call it a metal. You know that ordinary matter is electricity matter, and electricity matter metals conduct electricity readily. Now why shouldn't our 'light matter' metal conduct light? It would be a wonderful substance for windows.”
From The Black Star Passes, by John W. Campbell.
Published by Amazing Stories in 1930
Additional resources -

Thanks to Winchell Chung for contributing this item.

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Additional resources:
  More Ideas and Technology from The Black Star Passes
  More Ideas and Technology by John W. Campbell
  Tech news articles related to The Black Star Passes
  Tech news articles related to works by John W. Campbell

Lux-related news articles:
  - 'Super Photons' Blob State Matter
  - Crystalized Light Created At Princeton
  - Light Molecules (And Maybe Light Sabers, Someday)

Articles related to Material
Reconfigured Graphene 10X Strong, 5 Percent Dense, As Steel
MIT's aeroMorph Technology
Russia's Protective Ferrite Fabric
Carbyne, The Ultimate Form Of Carbon

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