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"Science fiction writers foresee the inevitable, and although problems and catastrophes may be inevitable, solutions are not."
- Isaac Asimov

Space Suit Helmet Rearview Mirror  
  Having a way to easily see behind you while wearing a spacesuit.  

Another thing space suits should have is rearview mirrors. While you are at it, add a window at the chin so that you can see where you step. But of the two, I would take a rearview mirror. You can’t glance behind you; you have to turn your entire body. Every few seconds I wanted to see if they were following us — and I couldn’t spare the effort. All that nightmare trek I kept imagining them on my heels, expecting a wormy hand on my shoulder. I listened for footsteps which couldn’t be heard in vacuum anyhow.
Technovelgy from Have Space Suit - Will Travel, by Robert Heinlein.
Published by Scribners in 1958
Additional resources -

Thanks to Atomic Rockets for having this quote.

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Additional resources:
  More Ideas and Technology from Have Space Suit - Will Travel
  More Ideas and Technology by Robert Heinlein
  Tech news articles related to Have Space Suit - Will Travel
  Tech news articles related to works by Robert Heinlein

Space Suit Helmet Rearview Mirror-related news articles:
  - Rear View Heads Up Display For Motorcycle Helmets

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Science Fiction in the News

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'It is as you thought when you constructed the time crystal, my master Vaylan.'

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'This was their world, their planet — this swift-traveling, yet seemingly moveless vessel.'

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'What's it do?' he asked. 'It amuses.'

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