Really, who needs science when you’ve got dragons? But if you want both, check out this article by Marc Lallanilla all about the science of Game of Thrones, including handy explainers on incest, wildfire, and never-ending seasons.
Science Caturday: Game of Thrones Edition
The Finch and Pea 
I like how that one guy is giving Ned’s cat the stink-eye.