to Lois Lane.

The mineral kryptonite, not to be confused with the real element krypton, was officially introduced in the radio serial The Adventures of Superman, in the story "The Meteor from Krypton", broadcast in June 1943."Only one arc in 1943 managed to transcend its era: "The Meteor from Krypton". Debuting on June 3, it marked the debut of kryptonite ..." An apocryphal story claims that kryptonite was