Astounding Stories was an American science fiction magazine that began in 1930 when Clayton Publishing launched it to capitalize on the interest in science fiction stories. In the 1930s, it became one of the most popular and influential magazines in the science fiction world; in 1934, it had double the circulation of its science-fiction rivals. While the magazine's title has changed over the years, in 2011, it became the longest-running, continuously published magazine dedicated to the science fiction genre. In fact, the magazine is included in the library of the International Space Station.