Other Worlds, Universe Science Fiction, and Science Stories were three related US magazines edited by Raymond A. Palmer. Other Worlds was launched in November 1949 by Palmer's Clark Publications and lasted for four years in its first run, with well-received stories such as "Enchanted Village" by A.E. van Vogt and "Way in the Middle of the Air", one of Ray Bradbury's "Martian Chronicle" stories. Since Palmer was both publisher and editor, he was free to follow his own editorial policy, and presented a wide array of science fiction.
Palmer entered a partnership with a Chicago businessman in 1953, to create Bell Publications, and printed Universe Science Fiction from June 1953. Palmer used the new company to abandon Other Worlds and launch Science Stories, in order to escape from Clark Publications' financial difficulties. Hence Science Stories can be considered a continuation of Other Worlds. Science Stories was visually attractive but contained no memorable fiction. Universe, on the other hand, was drab in appearance, but included some well-received stories, such as Theodore Sturgeon's "The World Well Lost", which examined homosexuality, a controversial topic for the time.
Palmer's Chicago partner lost interest, so he took over both Science Stories and Universe Science Fiction under a new company. In 1955 he culled both magazines and brought back Other Worlds, numbering the issues to make the new magazine appear a continuation of both the original Other Worlds and also of Universe. In this new incarnation the magazine was less successful, but did print Marion Zimmer Bradley's first novel, Falcons of Narabedla. In 1957 Palmer changed the focus of the magazine to UFOs, retitling it Flying Saucers from Other Worlds, and after the September 1957 issue no more fiction appeared. Palmer eventually settled on Flying Saucers, Mysteries of the Space Age as the title, and in that form it survived until June 1976.
In 1945, Raymond Palmer, the editor of Amazing Stories, published "I Remember Lemuria", by Richard Shaver, in the March 1945 issue. The story, about prehistoric civilizations, explained all the disasters on Earth as the work of evil robots. Palmer presented the story as a mixture of truth and fiction, and the response from readers was strong enough that he bought more stories from Shaver, and promoted what he called the "Shaver Mystery". Circulation grew dramatically, but the publisher, Ziff-Davis, became alarmed at the ridicule the stories were drawing in the press, and ordered Palmer to tone down the material. Palmer complied, but planned to leave. He formed his own publishing company, Clark Publications, in 1947, and launched Fate the following year. In 1949 Palmer left Ziff-Davis, and launched Other Worlds Science Stories in digest format; the editor was listed as Robert N. Webster, a pseudonym Palmer used to conceal his activities since he was still working at Ziff-Davis when the first issue appeared. Palmer had planned to distribute free copies of the first issue to fans at that year's World Science Fiction Convention in Cincinnati. Printing delays meant the magazine did not appear until late in the year. At the convention Palmer announced that "Robert N. Webster" was his pseudonym, and gave the convention organizers the original artwork for the first issue for auction. He also met, and immediately hired, Bea Mahaffey, a Cleveland fan, as his managing editor, starting with the fourth issue, dated May 1950.