Sometimes real science and unreal fiction don’t always work together but that doesn’t mean that we can’t enjoy the internal science of fiction. Take, for example, Game of Thrones. Well, it is Friday of Ice and Fire so you had to know that this was likely to be a GoT post.

PBS’ It’s Okay To Be Smart takes a look at some of the various bits of science unique to the Song of Ice and Fire franchise to see if it could work in our reality. Today’s video looks at the science of GoT’s seasons, the geography and geology of Westeros and Essos, forging Valyrian steel and more.