MAIN THEMES AND CHARACTERS Science fiction themes are many and varied. They range from cosmology and possible futures, such as the creation of the universe, ecology, parallel worlds or universes, the ultimate fate of the universe, alien invasions, apocalypses or world-wide disasters, post-apocalyptic life and the new societies that develop after such an event. Other themes are based on military strategy and weapons, ray guns and space wars, or about the role of technology, with an optimistic or pessimistic point of view. Science fiction also deals with other important topics: mind reading and mind control, political structures, such as galactic empires or interstellar federations of planets, utopias (outopias or dystopias11 and eutopias12), totalitarianism vs. libertarianism, colonization of other planets, moons, asteroids, etc., space exploration and faster-than-light travel and communications. Sci-fi stories are often populated by non-human intelligences: androids and gynoids, cyborgs, robots and humanoids, clones, extraterrestrial life, super-humans and mutants. Xenophobia or nonxenophobia are themes which are expressed through the attitudes of humans towards alien life forms. Some contrasting character archetypes are the absent-minded13 professor, the scientist or the mad scientist, the brave astronaut but even ordinary people. POPULARITY OF SCI-FI IN FILMS OR TV SERIES Science fiction films were immensely popular in the 1950s and the 1960s. They made a lot of money and audiences crowded the cinemas and asked for more. UFO sightings, reports of flying saucers14 or strange visitors from outer space became Hollywood commonplaces, such as in Howard Hawks s science-fiction film The Thing from Another World (1951). Many sci-fi films of the 1950s represented the human race as victimized and in the hands of mysterious, hostile, and unfriendly forces. The War of the Worlds (1953), the greatest alien invasion movie, is a famous example. Cold War politics contributed to suspicion, anxiety and paranoia of anything other or unAmerican , and the extraterrestrial invaders were a metaphor for the Communist threat15. 11. outopia, dystopia: negative utopia, i.e. a dreadful society. 12. eutopia: positive utopia, i.e. good, almost perfect society. 13. absent-minded: tending to forget things. 14. flying saucer: 15. threat: menace, danger. 7