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"It was [H.G. Wells'] adolescent fiction, his imaginative stories, that live forever - and yet are not acknowledged in literature classes as being great literature. So to hell with the academics!"
- Greg Bear

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
Will Space Stations Have Large Interior Spaces Again?
Reflect Orbital Offers 'Sunlight on Demand' And Light Pollution
Chrysalis Generation Ship to Alpha Centauri
The First Space Warship For Space Force

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Science Fiction in the News

Thermostabilized Wet Meat Product (NASA Prototype)
There are no orbiting Michelin stars. Yet.

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'Power could be compressed thus into an inch-square cube of what looked like blue-white ice'

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'It is necessary... for your own protection.'

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'It's so light that you can set it up in five minutes by yourself...'

Is It Time To Forbid Human Driving?
'Heavy penalties... were to be applied to any one found driving manually-controlled machines.'

Replace The Smartphone With A Connected Edge Node For AI Inference
'Buy a Little Dingbat... electropen, wrist watch, pocketphone, pocket radio, billfold ... all in one.'

Artificial Skin For Robots Is Coming Right Along
'... an elastic, tinted material that had all the feel and appearance of human flesh and epidermis.'

Robot Guard Dog On Duty
I might also be thinking of K-9 from Doctor Who.

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'It is remarkable that the long leverages of their machines are in most cases actuated by a sort of sham musculature...'

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