io9:
Every era in science fiction’s history has shown us a new vision of the strange and futuristic, and one image can spawn a million reflections in your mind’s eye.
Here are 21 unforgettable pictures that showcase the whole history of science fiction.
They really do a very good job of capturing each SciFi era in a single image.
io9 has a way with making good overviews about pop sf that many of us have long since consigned to background noise.