19th-century 19th-century-literature advanced-technology adventure alien alien-civilization alien-civilizations alien-invasion alien-life alien-species aliens allegory alternate-future alternate-history alternate-reality alternate-timeline alternative-history apocalyptic artificial-intelligence astronaut astronomy astrophysical-phenomena astrophysics biology british-literature cautionary-tale civilization class-divide class-division class-struggle classic classic-literature classics colonization disaster discovery dystopia dystopian dystopian-fiction dystopian-future dystopian-society earth eloi english-literature environmentalism epic epic-adventure escapism ethics evolution evolutionary-theory existentialism exploration exploration-of-time extraterrestrial extraterrestrial-communication extraterrestrial-intelligence extraterrestrial-life fantasy fast-paced fear-of-progress fiction friendship future future-societies future-society future-technology futurism futuristic futuristic-technology generation-ship genetic-engineering global-catastrophe h.-g. h.-g.-wells h.g.-wells heros-journey hope human-civilization human-evolution human-ingenuity human-nature human-progress human-resilience humanity humanitys-destiny humanitys-future humor imagination imaginative industrial-revolution inequality intelligent-life interstellar interstellar-travel invention inventions isolation journey life-forms london loneliness machine machines mathematical-puzzles microbial-life mission mission-to-mars moral-dilemmas morality morlocks mystery nasa near-future neuroscience outer-space paradox parallel-universes philosophical philosophical-themes philosophy physics planetary-exploration planetary-science post-apocalyptic problem-solving progress prophecy quantum-mechanics quest-for-knowledge realism relationships sci-fi science science-and-technology science-fantasy science-fiction science-fiction-thriller scientific scientific-discovery scientific-ethics scientific-experimentation scientific-experiments scientific-exploration scientific-invention scientific-inventions scientific-progress scientific-research scientific-romance scientific-speculation social-class social-commentary social-criticism social-critique social-hierarchy social-inequality societal-critique societal-decay society solar-system space space-adventure space-exploration space-mission space-opera space-technology space-travel spacecraft speculation speculative-fiction steampunk survival suspense teamwork technological-advancement technological-advancements technological-innovation technology thought-provoking thriller thrilling time-dilation time-machine time-manipulation time-paradox time-travel time-traveler unknown utopia utopian-society victorian victorian-england victorian-era victorian-literature victorian-society visionary warning wells wellsian