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 Title changed from Universe Science Fiction. Issues contained dual numbering both continuing the numbering of Universe Science Fiction and the numbering of the first series of Other Worlds (Science Stories).  | 
  
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 This issue, alone, was called just Other Worlds in the Table of Contents.  | 
   
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 Given as #21 (42) in the Table of Contents.  | 
   
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 Title changed from Other Worlds Science Stories. Although announced as being a “new magazine” it (intermittently) continued the (main) numbering sequence from the previous title. After the first four issues, listed here, the magazine continued as a non-fiction title.  | 
  
 First “Flying Saucer” issue, only fiction indexed. In this issue, “Flying Saucers” is printed in capitals in the title in the Table of Contents and in a much larger font on the cover.  | 
   
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