- Script
- Jack Schiff
- Pencils
- Rube Grossman
- Inks
- Rube Grossman
- Letters
- Ira Schnapp
- Genre
- advocacy; anthropomorphic-funny animals
- Characters
- Peter Porkchops; Wolfie; Mervin Mouse
Inside front cover.
- Script
- John Broome
- Pencils
- Sy Barry
- Inks
- Sy Barry
- Colors
- ?
- Letters
- ?
- Genre
- science fiction
- Characters
- Ag-Var; Bu-Marn; Willis; Dr. Benton
- Synopsis
- Martians travel to Earth but find it destroyed.
- Reprints
- Keywords
- Mars; time travel
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
- Script
- ?
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- ?
- First Line of Dialogue or Text
- Can the planets Mercury and Venus ever be seen during the night?
- Genre
- non-fiction; math & science
- Reprints
- Script
- John Broome
- Pencils
- Henry Sharp
- Inks
- Joe Giella
- Colors
- ?
- Letters
- ?
- Genre
- science fiction
- Reprints
Pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics.
- Script
- ?
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- ?
- Genre
- non-fiction; math & science
Information for this sequence from Arthur Lortie.
- Script
- Jack Miller
- Pencils
- Gil Kane
- Inks
- Bernard Sachs
- Colors
- ?
- Letters
- ?
- Genre
- science fiction
- Reprints
Pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics.
- Script
- ?
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- typeset
- Genre
- non-fiction
- Script
- ?
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- typeset
- Genre
- non-fiction; math & science
- Script
- Sid Gerson
- Pencils
- Carmine Infantino
- Inks
- Carmine Infantino
- Colors
- ?
- Letters
- ?
- Genre
- science fiction
- Reprints
Pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics.