#40YearsAgoToday #DCComics celebrated #50YearsOfPublishingNewComics with #CrisisOnInfiniteEarths #comics #1 #The1stMonthlyYearLongCrossoverComicSeries storyline #mergesMultipleEarthsOfSuperHeroes intros #Earth4’s #CharltonComics-acquired heroes & sees #Earth3 #CrimeSyndicate meetTheirEnd #DCCOMICS90