This is deeply nerdy but still oddly fascinating. AronRa gave this talk at DragonCon about how to fit the dragons of literature and film and fit them into modern cladistic taxonomy.
AronRa is a giant of a human who is physically intimidating and has this astonishing knack of churning out these 45-60 minute talks at an alarming rate. There are tricks that I've had in nearly every show I've ever done for over a decade and I don't think I've ever seen him give the same talk more than once.