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 robots Superman robots The Superman robots are fictional robots from the DC Comics Universe. The robots resembled Superman in appearance and abilities. Superman robots played a particularly dominant role in late 1950s and 1960s era Superman comics, when readers were first introduced to Superman possessing various robot duplicates. These robots each possessed a fraction of the Man of Steel's powers, and were sometimes used to substitute for him on missions (such as those where kryptonite was present) or for the purposes of protecting his secret identity (to that end, Superman also possessed a few Clark Kent robots). One notable Superman robot