If you like to get lost in impossibly large charts like the Stephen King Universe then I have a treat for you.
I've just come across a drawing/infographic/chart by Ward Shelley which plots the history of science fiction from its earliest precursors, the epic myths lost to time, through the enlightenment and the gothic novel to the birth of the first true SF novel, Frankenstein.
Things get awfully complicated after that point as SF branches off into multiple subgenres which split and recombine in surprising ways. Click on the infographic below to see more detail.
But before you get lost in the drawing, I wanted to point out that you can buy this as a print. At 40" by 22" it is not a large poster, but it is an expensive one. It cost me $44.
Too much, do you think?