"Born as the son of Jur-Ll (versus Superman's father, Jor-EL) in the Pre-Crisis reality termed "Earth-Three", Ultraman was the Kryptonian who grew up on the reversed Earth of that reality, and later as an adult became a member of the criminal organization the Crime Syndicate of America. Unlike Superman, the Earth-Three Ultraman gets stronger every time he is exposed to kryptonite, originally developing a completely new superpower with each new exposure. In one such encounter, Ultraman acquired the ability to see through dimensional barriers, thus alerting the Crime Syndicate to the existence of alternate Earths in their first appearance. This allowed the Syndicate to attack the Justice League and Justice Society. Ultraman also differed from Superman in that his version of Krypton had not exploded. Where the Kryptonite came from is unknown."