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"Beyond a thousand years from now humans are not quite recognizably human, and I have trouble finding characters."
- Larry Niven

Ramscoop  
  An enormous magnetic field precedes a spaceship moving through space, directing interstellar hydrogen inward for use as fuel.  

See Bussard Ramjet.

The space telescopes, unhampered by atmospheric distortion, were able to see planets circling other suns; and the interstellar ramscoop robots had been searching out man-habitable systems for nearly a century.
Technovelgy from World of Ptavvs, by Larry Niven.
Published by Worlds of Tomorrow in 1965
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