“It was like a distant depth charge, yet—” it sent Captain Harvey’s nuclear sub to a different time where “—the enemy, whoever they were, technically outclassed his own culture by about fifteen hundred years, if not more.” Or maybe it was something else out there in that fetid heat.
Michael Main
The past—could there be such a thing as a time-shift? The whole idea was a paradox, wasn’t it? Like that yarn about the chap who went back in time and murdered his own grandfather.

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  1. “Routine Exercise” by Philip E. High, New Worlds Science Fiction #103, February 1961.
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Philip E. High