Happy birthday to Batman! This week marks the 75th anniversary of the debut of Gotham’s grimmest vigilante, in the pages of 1939’s Detective Comics #27. And that means 75 years of dark, gritty superhero tales, right? Not exactly! Here’s a little-known fact: A surprisingly large portion of Batman’s publication history has featured truly ridiculous stories with even more ridiculous cover images. In honor of the Caped Crusader’s diamond anniversary, we’ve gathered together a bouquet of the oddest Batman comic-book covers, so get ready for Bat-Baby, Zebra Batman, and more stuff from beyond your wildest technicolor fever dreams!