Earth Prime (or Earth-Prime) is a term sometimes used in works of
speculative fiction, most notably in DC Comics, involving parallel
universes or a multiverse, and refers either to the universe
containing "our" Earth, or to a parallel world with a bare minimum of
divergence points from Earth as we know it â€" often the absence or
near-absence of metahumans, or with their existence confined to
fictional narratives like comics. The "Earth Prime" of a given
fictional setting may or may not have an intrinsic value to or vital
connection to the other Earths it exists alongside (although it
appears to be the case that such Prime Earths â€" and sometimes the
'central universes' in which those Prime Earths exist as well â€" are
portrayed in fiction to be vital to the existence of the other
Earths).In the DC Multiverse Earth-Prime is the true Earth from which
all the other worlds within the Multiverse originate, the "actual"
reality where the readers of DC Comics live (and where DC Comics
operates as a publisher), and is an Earth where all superheroes are
fictional. Earth-Prime does, however, became an alternate reality in
its first appearance in The Flash #179 (May, 1968), when the Flash
accidentally travels there from Earth-One by being pushed by a
creature called The Nok. The Flash, stranded, contacts then-DC Comics
editor Julius Schwartz, who helps him construct a cosmic treadmill to
return to Earth-One. Eventually, it was stated that the writers of DC
Comics of Earth Prime subconsciously base their stories on the
adventures of the heroes on Earth-One and Earth-Two.In the DC
Multiverse Earth-Prime is the true Earth from which all the other
worlds within the Multiverse originate, the "actual" reality where the
readers of DC Comics live (and where DC Comics operates as a
publisher), and is an Earth where all superheroes are fictional.
Earth-Prime does, however, became an alternate reality in its first
appearance in The Flash #179 (May, 1968), when the Flash accidentally
travels there from Earth-One by being pushed by a creature called The
Nok. The Flash, stranded, contacts then-DC Comics editor Julius
Schwartz, who helps him construct a cosmic treadmill to return to
Earth-One. Eventually, it was stated that the writers of DC Comics of
Earth Prime subconsciously base their stories on the adventures of the
heroes on Earth-One and Earth-Two.In The Flash #228 (July/Aug 1974),
Earth-Prime's Cary Bates travels to Earth-One, where he discovers that
the stories he writes are not only based on events on Earth-One, but
can actually influence these events as well. This power turns for the
worse in Justice League of America #123 (October 1975), when Bates is
accidentally transported to Earth-Two. The interdimensional trip
temporarily turns Bates into a supervillain, and he quickly kills the
Justice Society of America. Luckily, fellow DC writer Elliot S.
Maggin, with the help of the Justice League and the Spectre, is able
to restore matters on both Earths in Justice League of America #124
(November 1975).The first superhero of Earth-Prime is Ultraa,
introduced in Justice League of America #153. Like Superman, Ultraa
was the sole survivor of a destroyed alien world, rocketed to
Earth-Prime as a baby. After his first encounter with the Justice
League, Ultraa decided Earth-Prime was not ready for superheroes and
relocated to Earth-One. Post-Crisis on Infinite Earths in 1985, when
there was no longer an Earth-Prime or greater Multiverse, Ultraa was
retconned into being from the planet Almerac, homeworld of Maxima. Earth Prime Top Movies & Young Movies