• Earth-Zero, It is a homage to Htrae, the Bizarro World, with its population of Bizarros and its cubical shape. The original Bizarro World was not a parallel Earth, but another planet that existed in the same universe as Earth-One.
• This was one of the proposed names for the post-Zero Hour DC Universe after a somewhat definitive timeline was established otimeline Action Comics #263 March 31 1960 was established^[2]

• The default Earth for most of DC's comics during the time the original DC Multiverse construct was in use, Earth-One was by far the most populated and widely explored and it retained dominance over the other four worlds which were merged with it (Earth-Two, Earth-Four, Earth-S, and Earth-X) during the Crisis on Infinite Earths storyline.
• First described as a distinct Earth in The Flash #123 (September 1961), first named in Justice League of America #21 (August 1963)

The Earth-One Batman and Gotham City first appeared in Detective Comics #327 (May 1964)^[4][5]

• Politically, Earth-Two was different from the Earth-One template modeled after Earth-Prime. For example, Quebec was an independent nation autonomous from Canada, South Africa had abolished apartheid sooner and the Atlantean countries of Poseidonis and Tritonis were both ruled by a queen, not a king, their inhabitants displaying surface-dweller features and no capacity for underwater survival, as the Atlantis continent had been raised to the surface (the model was the Atlantis seen in Golden Age Wonder Woman stories).
• First described as a distinct Earth in The Flash #123 (September 1961), first named in Justice League of America #21 (August 1963)
• Hypertime version called Earth-2

• Clark Kent worked for the Daily Planet under editor Parry White in the 1940s and 1950s (on the regular Earth-Two, Kent worked for the Daily Star, his editor was George Taylor and Perry White was a reporter)
• Suggested by E. Nelson Bridwell in the Superman Family letters page to explain inconsistencies in 1940s and 1950s Superman stories with Earth-Two history
• First named as a distinct Earth in The Official Crisis on Infinite Earths Index (March 1986)
• DC Wiki suggests that the Golden Age appearances of Superboy might have been on this Earth. Note: this is different from Earth-Forty, where Superboy was already a famous superhero who grew up and regularly operated in Metropolis.

• History was "backwards": American Christopher Columbus discovered Europe; Great Britain won its freedom from the United States; President John Wilkes Booth was assassinated by a crazed actor named Abraham Lincoln; the United States flag's colors were reversed: black stars on a red field, with alternating blue and black stripes; and all superheroes are supervillains and vice versa.
• A Hypertime version of Earth-Three was seen in Another Nail

• This Earth was introduced at the beginning of Crisis, and disappeared less than a year later, when it merged with the four other surviving Earths (Earth-One, Earth-Two, Earth-S, and Earth-X) of the DC Multiverse
• Named in Crisis on Infinite Earths #1 (April 1985)
• Hypertime versions called Earth-4 and Earth 4

• Transported by the Phantom Stranger to a universe with no Krypton and no superheroes, the Earth-One Batman prevents the murders of the Earth-Five versions of his parents. Intrigued with and in gratitude of his Earth-One counterpart's actions, this Earth's Bruce Wayne is inspired to become a hero in a similar guise as his family's rescuer.
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• Earth-Six is apparently ruled by a royal family of superheroes (Lord Volt is referred to as the king, and he mentions his family's reign over Earth). On this Earth, America lost the Revolutionary War, and technology appears to have advanced more rapidly than on Earth-One. Earth-Six was destroyed in Crisis, with only Lady Quark surviving.

• The Anti-Monitor saved the Dark Angel, just as the Monitor had saved her good counterpart Harbinger.^[7] The only known survivor of Earth-Seven, the Dark Angel escaped the compression of the Multiverse to torment Donna Troy across several lifetimes.^[7]

• Home to DC characters created after Crisis on Infinite Earths, as mentioned in an interview with Infinite Crisis writer Geoff Johns^[8]

• Home to "Tin", a robot. A nuclear war devastated this Earth in 1966.
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• This Earth may have been home to other comedic superheroes published by DC. Additionally, references within the series pointed to versions of Justice League members having existed in that universe.
• Named in The Oz-Wonderland War #3 (March 1986)
• Was stated as being separate from Earth-B^[6] or part of "Earth-B"^[9]
• A brief glimpse of a Hypertime version of this Earth is seen in Another Nail

• The world where all Pre-Crisis non-Kirby Fourth World tales took place, according to Mark Evanier's speculation in the text page of New Gods (1984 reprint series) #1
• Mentioned in Animal Man, where purple butterflies are an "Earth-14 species"

• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• An Earth based around the "grim 'n gritty" stories of the 1980s, the heroes of this Earth were actually part of an experiment created by the government. The inhabitants of this Earth were Overman (Superman's counterpart), who went mad and destructive after contracting a sexually transmitted infection, a black and muscular Wonder Woman, an unnamed Flash and a punk-style Green Lantern.
• Named in The Essential Wonder Woman Encyclopedia (2010)
• Overman made an appearance in Infinite Crisis #5 (April 2006).

• A pocket reality created by the Time Trapper as part of an elaborate plan to destroy the Legion of Super-Heroes. The Trapper "pruned" his pocket reality until only Earth and Krypton had any life. Three Phantom Zone criminals destroyed all life on Earth, leaving the reality a dead wasteland with the Matrix Supergirl being the only survivor.
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• One of three Earths named by Alexander Luthor in Infinite Crisis in his search for the perfect Earth; no information is provided

• Home of variant versions of Animal Man, Batman, and B'wana Beast and many historical divergences, such as Hitler's hanging for his war crimes and Edward Kennedy's drowning at Chappaquiddick. The American government is corrupt and extremely right-wing.
• The Buddy Baker of the Post-Crisis Earth could only exist on this Earth in the body and mind of that Earth's Buddy Baker and could only leave by killing his parallel self
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• After Carol Ferris professed her love for Hal Jordan instead of Green Lantern and accepted his marriage proposal, the Earth-One Green Lantern eventually figured out that he had somehow shifted into a parallel universe, which he compared to Earth-Two and Earth-Three.
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• Billy Batson has the identity of Captain Thunder, Superboy was raised in Metropolis, Wonder Woman fought in World War II and Bruce Wayne retired in the mid-1960s to make way for a new Batman and Robin team
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• An Earth where Superman and Luthor died in their final battle
• Superman was replaced by a Kandorian and eventually switched with the Superman of Earth-215
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

(Earth-B2)

• The hardcover book Crisis on Infinite Earths: Absolute Edition (November 2005) has "See Earth-46" under the Earth-B2 entry...but there is not even a listing for Earth-Forty-Six in the index. As a result, details of this reality are unknown, though the name suggests some sort of variant of Earth-B.

• As Krypton Girl, Lois Lane of Krypton quickly tires of Clark Kent's attempts at finding out her secret identity and sends him to the Phantom Zone
• Designated canon in Crisis on Infinite Earths: Absolute Edition (November 2005)

• Superman marries Lois Lane, Lana Lang and Lori Lemaris, who all tragically die after the wedding
• Designated canon in Crisis on Infinite Earths: Absolute Edition (November 2005)

• A technologically advanced Earth where Tommy Tomorrow became the first man on Mars in 1960
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• Superman is married to both Lois Lane and Lana Lang
• Jimmy Olsen is married to Supergirl
• Named in Crisis on Infinite Earths: Absolute Edition (November 2005)

• The first parallel Earth to be featured in DC Comics was visited by the Earth-Two Wonder Woman, who worked with her counterpart to battle the conqueror Duke Dazam. This Earth appeared to be technologically less advanced than Earth-Two, with Dazam's navy using oar-powered ships. "Tara Terruna" translates from this Earth's language to mean "Wonder Woman".
• Named in The Essential Wonder Woman Encyclopedia (2010)