#OnThisDay in 1961 #MonEl debuted in #Superboy #comics #89 #LarGand #SuperPoweredAmnesiac who #arrivesOnEarthOnAMonday & recallsSpendingTimeOn #Krypton w #JorEl #leadingSuperboyToBelieveHesHisOlderBrother (Monday/Mon-El) until his #vulnerabilityToLeadInsteadOfKryptonite proved he’s fromPlanet #Daxam