Alternative versions of Superman establish a new continuity for DC, affecting not only Superman, but all of the DC Comics characters. The versions of Superman from this time period are traditionally divided into three main periods. The first version of Superman began being published by DC Comics in 1938 appearing in "Action Comics" #1. To explain discrepancies in the aging of Superman across several decades, his earliest stories were retroactively portrayed as having taken place on an alternative world called Earth-Two. These stories take place from 1938 until the late 1950s, although the exact dividing line is unclear and some stories happened identically to
Superman for copyright infringement. The trial began in March 1948 after seven years of discovery. The judge ruled that Fawcett had indeed infringed on Superman. However, the judge also found that the copyright notices that appeared with the Superman newspaper strips did not meet the technical standards of the Copyright Act of 1909 and were therefore invalid. Furthermore, since the newspaper strips carried stories adapted from "Action Comics", the judge ruled that DC Comics had effectively abandoned the copyright to the "Action Comics" stories. The judge ruled that DC Comics had effectively abandoned the copyright to Superman and therefore waived its