Superboy has been turned into a giant ape! And he's attacking Clark Kent! How can this be?! I've never read Superboy #142, so I have no idea how writer E. Nelson Bridwell managed to take this cover by Curt Swan and George Klein and turn it into a story. Perhaps I'll never know...
(Standard disclaimer about apes not really being monkeys applies.)
Image is courtesy of the GCD. Click on the image for a full-sized version.
