- Script:
- Otto Binder
- Pencils:
- John Sikela
- Inks:
- John Sikela
- Colors:
- ?
- Letters:
- ?
- Genre:
- superhero
- Characters:
- Superboy; Professor Lang; Kryptonite; Blacky Stone
- Synopsis:
- Professor Lang discovers a bunch of eggs from Krypton.
- Reprints:
The reprint in Superboy 174 includes a hypen in the title (Super-Zoo).
- Script:
- Jerry Coleman ?; Otto Binder ?
- Pencils:
- Curt Swan
- Inks:
- John Giunta ?; John Fischetti ?
- Colors:
- ?
- Letters:
- ?
- Genre:
- superhero
- Characters:
- Superman; Martha Kent; Jonathan Kent; Professor Weldon; Lana Lang; Superboy
- Synopsis:
- Prof. Weldon's machine transmits Superboy into the future, so Superman is sent to the past to replace him.
- Reprints:
Bob Bailey credited the script to Otto Binder, 30 January 2005; Bob Hughes suggested Jerry Coleman, March 2009. Bob Bailey credited the inks to John Fischetti, 30 January 2005; Bob Hughes suggested John Giunta, March 2009.