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Amazing map of the history of science fiction, from its fantasy origins in Gilgamesh to modern mainstream television with stops along the way for gothic novels, Frankenstein, H.G. Wells, Olaf Stapledon, cyberpunk and so much more.
This comes from the Mapping Science website, but I haven’t been able to find an entry for it there.
(I saw this all over the place, but special thanks to Ian for finally getting me to take a look)