Earth-TwoEarth-Two (also Earth 2) is a setting for stories (a "fictional universe") appearing in American comic books published by DC Comics. First appearing in The Flash #123 (1961), Earth-Two was created to explain differences between the original Golden Age and then-current Silver Age versions of characters such as the Flash, and how the current (Earth-One) versions could appear in stories alongside earlier versions of the same character concepts.
Power GirlPower Girl, also known as Kara Zor-L, Karen Starr and Paige, is a superheroine appearing in American comic books by DC Comics, making her first appearance in All Star Comics #58 (January/February 1976). Power Girl is the cousin of the superhero Superman, but from an alternate universe in the fictional multiverse in which DC Comics stories are set. Originally hailing from the world of Earth-Two, first envisioned as the home of DC's wartime heroes as published in 1940s comic books, Power Girl becomes stranded in the main universe where DC stories are set, and becomes acquainted with that world's Superman and her own counterpart, Supergirl.
Flash (Jay Garrick)Jason Peter "Jay" Garrick is a superhero appearing in American comic books published by DC Comics. He is the first character known as the Flash. The character first appeared in Flash Comics #1 (January 1940), created by writer Gardner Fox and artist Harry Lampert. Garrick gained the ability to move at superhuman speed due to a laboratory accident. Jay chose to fight crime as a costumed vigilante, while calling himself "the Flash". Jay Garrick has made numerous appearances in other media.
Justice Society of AmericaThe Justice Society of America (JSA), or Justice Society (JS), is a superhero team appearing in American comic books published by DC Comics. It was conceived by editor Sheldon Mayer and writer Gardner Fox during the Golden Age of Comic Books. It first appeared in All Star Comics #3 (Winter 1940–1941), making it the first team of superheroes in comic books. Its original members were Doctor Fate, Hourman, the Spectre, Sandman, Atom, the Flash, Green Lantern and Hawkman.
American comic bookAn American comic book is a thin periodical originating in the United States, on average 32 pages, containing comics. While the form originated in 1933, American comic books first gained popularity after the 1938 publication of Action Comics, which included the debut of the superhero Superman. This was followed by a superhero boom that lasted until the end of World War II. After the war, while superheroes were marginalized, the comic book industry rapidly expanded and genres such as horror, crime, science fiction and romance became popular.
Silver Age of Comic BooksThe Silver Age of Comic Books was a period of artistic advancement and widespread commercial success in mainstream American comic books, predominantly those featuring the superhero archetype. Following the Golden Age of Comic Books and an interregnum in the early to mid-1950s, the Silver Age is considered to cover the period from 1956 to 1970, and was succeeded by the Bronze Age. The popularity and circulation of comic books about superheroes had declined following World War II, and comic books about horror, crime and romance took larger shares of the market.
SuperheroA superhero or superheroine is a stock character that typically possesses superpowers, abilities beyond those of ordinary people, and fits the role of the hero, typically using their powers to help the world become a better place, or dedicating themselves to protecting the public and fighting crime. Superhero fiction is the genre of fiction that is centered on such characters, especially, since the 1930s, in American comic books (and later in Hollywood films, film serials, television and video games), as well as in Japanese media (including kamishibai, tokusatsu, manga, anime and video games).
