The book portrays Superman fighting a Brontosaurus with his fists before producing a sharp object and stabbing the dinosaur in the neck, killing it.
- Supergirl would later tame a Brontosaurus, who she named Bronty, after a brief struggle in 1960. ("The Cave-Girl of Steel")
- The reasons for Superman's attacking of this prehistoric animal are unknown. In the Golden Age, Superman had not yet adopted his policy against killing.