#OnThisDay in 1940 #TheAtom debuted in #AllAmericanComics #19 #AlPratt 5’ 1” #CalvinCollege soph/eventual #physics prof #trainedAsAFighterToFightCrimeInCostume #1948SuperPowerReboot via #Cyclotron #tradesSackMaskForFinToppedHalfMask & #AtomicPunch #AtomSmasher #Damage progenitor