This paper examines the Argentine magazine Más Allá [Beyond] (1953–1957), the most influential Latin American science fiction magazine in history, in conjunction with its parent magazine Galaxy Science Fiction, published in the U.S. starting in 1950. The relationship between these two iconic magazines might seem destined to be a clear-cut case of imitation, but it manages to be much the opposite. Although its fictional material consisted largely of Northern science fiction in translation, a number of Argentine science fiction writers were first published in Más Allá, and, in addition to their stories and novellas, each issue contained an original editorial, several original longer scientific sections, as well as an important column for readers’ letters called “Proyectiles dirigidos” [“Guided Missiles”]. Through an examination of “Argentine” elements such as these as well as of the material translated from Galaxy, this paper explores a pivotal moment for the influence-versus-originality debate in Latin American science fiction and discusses how Más Allá managed to become a truly Argentine magazine and a primary impetus behind the golden age of science fiction in Latin America.