762 – Blue Kryptonite
Blue kryptonite makes its first appearance in Superman #140 (August 1960), when Superman and Supergirl take on the entire Bizarro world of imperfect Supermen and Lois Lanes. This time a seemingly human child is born to Bizarro No. 1 and sent to Earth, where Supergirl helps care for him. Supergirl falls into the path of […]
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