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: Up, Up and Away! Knowing that it in fact contains blueprints and designs from his Kryptonian parents, he throws it into the landscape and watches it construct a massive citadel. Superman decides to use this as his new Fortress of Solitude. Superman: Up, Up and Away! "Up, Up, and Away!" is an eight-issue Superman story arc written by Geoff Johns and Kurt Busiek with art by Pete Woods. It was originally published in "Action Comics" #837-840 and "Superman" #650-653 by DC Comics from May through August 2006. This was the first One Year Later Superman story. The story primarily features a powerless Clark Kent