Many of Superman’s most iconic villains are introduced in this era, and most of them take on a science fiction theme, including Brainiac and Bizarro. Superman also helps find the Justice League of America, marking one of the first pan-label crossover teams in comic book history. During the 1960s, his origin is revealed: Superman was born on Krypton, to Jor-El (a slight change from the Golden Age Jor-L) by Lara Lor-Van. Rejected by the Science Council, Jor-El labors to build a vessel that can transport his family away from the impending catastrophe. The planet’s destruction begins before Jor-El predicted, however, and he can only send his son.