Editing Krypton (comics) (section)

====The Last Son of Krypton====
A central theme of this version of the Superman [[Mythology|mythos]] was that the character was to remain the last surviving remnant of Krypton. Thus, Silver Age elements such as [[Supergirl]], [[Krypto]], [[Beppo (comics)|Beppo]], and [[Kandor (comics)|Kandor]] had never existed in this version (though Post-''Crisis'' versions of these elements were eventually reintroduced).

The supervillain [[Doomsday (comics)|Doomsday]] was revealed in the 1990s as a being genetically engineered by Bertron, an alien scientist, on an ancient Krypton. Doomsday left the planet after killing Bertron and Krypton's natives found the remains of Bertron's lab, thus obtaining the knowledge of cloning.

In the newer continuity, Superman also became aware of his alien heritage only sometime after his debut as a [[superhero]] - initially assuming himself to be a human mutated in some manner and launched as part of an Earth space program - when a holographic program encoded into the craft which brought him to Earth uploaded the information into his brain (although Lex Luthor had earlier discovered his alien heritage when his attempts to create a [[Bizarro|clone]] of Superman were complicated by the unexpected x-factor of Superman's alien DNA).