Within alphabetical the correct sequence:

Aliens (see Aliens in fiction) Alien invasion Benevolent aliens first contact Principles of non-nonintervention (e.g. Prime Directive) Xenobiology Androids and Gynoids Cyborgs and Bionics and Cybernetics Robots Apocalypses or world wide disasters See too Post-apocalyptic science fiction Arcologies Artificial gravity Artificial intelligence von Neumann machines Clones Colonization Terraforming Cosmology Creation of the Universe Ultimate fate of the Universe Omega Point Cryonics Cyberpunk Steampunk Detective Ecology Symbionts Science Fiction is utilized to raise awareness of Ecological ideas. Lends itself easily to dystopian stock. Frank Herbert & Kim Stanley Robinson come known for their good concern using ecological issues. Economics "Age of Greater Scarcity", typically around connection sustaining ecological or even post-apocalyptic themes. Within such dystopias, people come poorer & use fewer resources to draw in. Post-"Age of Scarcity" (arguments over how to distribute resources are irrelevant since anyone can have anything they reasonably want). Examples include: #Ian M. Banks' The Culture #Cory Doctorow's Down and Out in the Magic Kingdom, which uses the "reputation economy" #Frederik Pohl's The Midas Plague Fantasy fiction Galactic Empire History Alternate history History repeating itself (either in hanker or even short scales) Scientific prediction of the future (e.g. psychohistory) Secret history Horror fiction Immortality and Life extension Intangibility Invisibility Language Alien languages (e.g. Klingon) All human being speaking of these language (even Esperanto) Current human being languages evolving/splitting The Sapir-Whorf Hypothesis being strongly true (e.g. Babel 17 by Samuel R. Delany or The Languages of Pao by Jack Vance) Universal Translators (e.g. Babel fish) Military - strategy, weapons, ranks, technologies. Ray guns Space warfare Mind Artificial intelligence Beings of pure mentality Hive minds Memory removal/editing Mind control Mind uploading Neural implants & interfacing by owning machinery (directly) Solipsism Mutants Nanotechnology Parallel worlds or universes. Planets in Science Fiction Politics in Science Fiction Dystopias and (supposed) utopias Galactic Empire Interstellar federation of planets Totalitarianism vs. Libertarianism (see: Libertarian science fiction) World government Workable anarchism (see: Anarcho-capitalist literature) Post-apocalyptic science fiction and new societies that have when a event There occurs as space depending civilization variant of this theme. This plot device allows writers to write soft science fiction while accounting for the lack of technical advancement & so similarity to the present day. Posthumanism Enhancement of the organism Body modification, including genetic modification Cyborgs Psi powers and psychic phenomenon Clairvoyance Telepathy Telekinesis Resizing Sex (including gender roles, polygamy, sexuality and procreation) Shapeshifting Simulated reality Sociology and sociobiology return to feudalism hive-rather eusocial societies future caste systems Space Exploration Interstellar travel Faster-than-light travel and communications Hyperspace Warp drives Wormholes Ansibles Very about weak speed Ursula LeGuin's NAFAL ships, & a Twin paradox Much slower than Light Generation ship Sleeper ship Moving planets Space stations Colonization of Other Planets, moons, asteroids. Terraforming Superhumans Technology and its side effects Nanotechnology Singularity Telepathy Teleportation Time travel Alternate history: time travel may be utilized as a plot device to choose parallel universes. When guide history has its have category (view above), it typically occurs eventually travel stories also. Anachronism The Grandfather paradox -- e.g. Might individual last back eventually & destroy his parents prior to it beget a killer? Uplift -- e.g. applying technology to "raise" non-individual fauna to human being evolutionary levels. Moreaus/Unpeople Virtual reality