future interstellar communist civilization and is considered one of the most important Soviet science fiction novels. In 1959, Robert A. Heinlein's Starship Troopers marked a departure from his earlier juvenile stories and novels. It is one of the first and most influential examples of military science fiction, and introduced the concept of powered armor exoskeletons. The German space opera series Perry Rhodan, written by various authors, started in 1961 with an account of the first Moon landing and has since expanded in space to multiple universes, and in time by billions of years. It has become the most popular science fiction book series of all time. In the 1960s and 1970s, New Wave science fiction was known for its embrace of a high degree of experimentation, both in form and in content, and a highbrow and self-consciously "literary" or "artistic" sensibility. In 1961, Solaris by Stanisław Lem was published in Poland. The novel dealt with the theme of human limitations as its characters attempted to study a seemingly intelligent ocean on a newly discovered planet. 1965's Dune by Frank Herbert featured a much more complex and detailed imagined future society than had previous science fiction. In 1967 Anne McCaffrey began her Dragonriders of Pern science fantasy series. Two of the novellas included in the first novel, Dragonflight, made McCaffrey the first woman to win a Hugo or Nebula Award. In 1968, Philip K. Dick's Do Androids Dream of Electric Sheep?, was published. It is the literary source of the Blade Runner movie franchise. 1969's The Left Hand of Darkness by Ursula K. Le Guin was set on a planet in which the inhabitants have no fixed gender. It is one of the most influential examples of social science fiction, feminist science fiction, and anthropological science fiction. In 1979, Science Fiction World began publication in the People's Republic of China. It dominates the Chinese science fiction magazine market, at one time claiming a circulation of 300,000 copies per issue and an estimated 3–5 readers per copy (giving it a total estimated readership of at least 1 million), making it the world's most popular science fiction periodical. In 1984, William Gibson's first novel, Neuromancer, helped popularize cyberpunk and the word "cyberspace," a term he originally coined in his 1982 short story Burning Chrome. In 1986, Shards of Honor by Lois McMaster Bujold began her Vorkosigan Saga. 1992's Snow Crash by Neal Stephenson