The folks at Generation Anthropocene have created a geologic history of the fictional world in George R.R. Martin’s Game of Thrones. They walk us through eight eras of geological development that explain the environment in which all the characters you like die horrible (plus one more explanation of how big the planet is). Each post helps you understand both geology and the Game of Thrones world a bit better.

If you are interested in how people got around Westeros, you should check out Michael Tyznik’s stylish transit map.