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"I think crypto will slowly percolate its way up and people will adopt it gradually as user friendly, cheap products, become available."
- Neal Stephenson

Inter-Universal Messenger  
  A device intended to travel to another dimension.  

As it eventually worked out, the inter-universal messenger had to be constructed from the sub-microscopic level on up out of fundamental nuclear particles which came as close to being nothing at all as either universe would ever be likely to provide: zero-spin particles with various charges and masses, and neutrino/anti-neutrino pairs. Even detecting that the object was present at all after it had been built was an almost impossible task, for neutrinos and anti-neutrinos have no mass and no charge, consisting instead partly of spin, partly of energy of translation; it did no good to try to visualize such particles since like all the fundamental particles they were entirely outside of experience in the macroscopic world. Matter was so completely transparent to them that stopping an average neutrino in flight would require a lead barrier fifty light years thick.
Technovelgy from Cities in Flight, by James Blish.
Published by Avon in 1957
Additional resources -

Cities in Flight is a set of novels; this item is taken from The Triumph of Time.

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Additional resources:
  More Ideas and Technology from Cities in Flight
  More Ideas and Technology by James Blish
  Tech news articles related to Cities in Flight
  Tech news articles related to works by James Blish

Inter-Universal Messenger-related news articles:
  - AMANDA May Find Probes To Other Dimensions

Articles related to Space Tech
The Warp And Fabric Of Spacetime
NASA Tests Prototype Europa Lander
NASA's Psyche Mission To Metal Asteroid Launches Thursday!
Space Weather To Universe Weather

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Science Fiction in the News

Russians Think US Is Weaponizing Asteroids
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The Warp And Fabric Of Spacetime
'Jenkins had evidently fallen into a warp in space.'

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Keep your eyes on the skies!

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'... he had tightened the chest to gain maximum pumping action from the motion of breathing.'

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'...a prayer wheel swung into view and began spinning at a furious pace.'

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'The program raced up the screen one scan line at a time'

'Feel the AGI' OpenAI Leader Now OpenWorship
'And are all the people willing to be governed by a machine?'

NASA Tests Prototype Europa Lander
Why have legs if they don't walk around?

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'...it was so easy for me to remain motionless in midair.'

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