A voice, purporting to be from the future, warns mankind that they must all go into suspended animation or face extinction; mankind obeys, but when they wake up, the people at the other end of the future phone don’t know anything about the earlier message.

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  1. “The Prophetic Voice” by Laurence Manning, in Wonder Stories, April 1935.
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Laurence Manning