Earth-80

Earth-80 is a reality in the multiverse. By all appearances, it is the same as Earth-95 and real life with one major exception: travel to alternate realities has been discovered and is possible, albeit not to the knowledge of most of this Earth's inhabitants. In 2015, a handful of its inhabitants were sent to various alternate Earths before eventually returning to their own.

History
Though the full history of Earth-80 is not known, it seems to be more or less identical to the history of Earth-95 up until the point when the existence of the multiverse was discovered by Professor Horace Sutton. His children Jake and Hayley Sutton, along with some friends of theirs, later became aware of their father's discovery, only to inadvertently use his means of traversing the multiverse to do so themselves. After a series of misadventures and close calls, they eventually returned to their own universe.