UE-38

An unknown Earth was a universe in the Original Multiverse.

History
In 2019, during the Crisis this universe was destroyed by an antimatter wave but one resident went inside a wormhole that led her to Earth-Prime without knowing that she landed on another Earth.

Trivia

 * It is unknown if the gender reversal of Brainiac 5 is exclusive to her or everyone on this Earth have a reversed gender.