Superman #212

In a flashback to Krypton’s final days, Superman learns of a mysterious connection to the planet’s past through Professor Amos Dunn, a scientist who once met Jor-El and Lara before the world’s destruction. When two criminals exploit Dunn’s abandoned "Matter-Radio" technology for a dangerous crime spree, Superman must confront the past while protecting the present—before the stolen science unleashes chaos.

In "The Girl Superbaby!", Supergirl's heroic instincts shine even in her most unexpected form—after being exposed to the Fountain of Youth while helping an old man, she’s transformed into a baby. Despite her tiny size, her superpowers remain, and she uses them to aid the police in catching two jewel thieves, proving that courage and heroism come in all sizes.