DC
Released April 1961
Action Comics #275
Published
April 1961
Pages
32
The Menace of Red-Green Kryptonite! (Superman) -- 2. Ma and Pa Kent Adopt Supergirl! (Supergirl)
Key Facts
- First mention of Superman's Heat Vision power - previous issues demonstrated his X-Ray vision having powers to melt glaciers
- Debut of Red/Green Kryptonite - causes mutations including an extra eye on the back of Superman's head
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