Superman: Whatever Happened to the Man of Tomorrow? reference to one of the nicknames of Superman as the "Man of Tomorrow", and was later again used in the title of another Superman . The comic book, "Action Comics" #1, published in April 1938 by "National Allied Publications" (later renamed DC Comics), marked the first publication of the character of Superman created by Jerry Siegel and Joe Shuster. The comic quickly became a success, and its editor soon realized that it was because of the popularity of the character. In an unprecedented move at the time, National Allied Publications introduced a second comic book, "Superman", exclusively featuring the popular
Origin of Superman time in "Superman" #61. "Action Comics" #158 retold the origin again, this time acknowledging the adventures of Superboy. After Mort Weisinger took over as editor of the Superboy comics in 1953, the mythology of Superman began growing, starting with the introduction of Superboy's pet Krypto the Superdog, the first survivor of Krypton in comics other than Kal-El himself. When Weisinger became editor of the entire Superman line in 1958, the Superman mythology began expanding even more rapidly. Producing over a hundred Superman stories a year, Weisinger aimed to introduce a new element to the character's mythology every six months. By