Annalee Newitz of science fiction blog io9 points to a neat post they've just published with…
Beautiful infoporn, showing the rise and fall of 5 major scifi themes (robots, aliens, time travel, etc.) since 1970, from io9's
graphic designer Steph Fox. Now we just need somebody to interpret the data! Why is there a rise in shows about magic, and a fall in shows about space travel, right at
the start of the Bush Administration?"
At Last, A Graph That Explains Scifi TV After Star Trek (io9)