This week on The Method Section, Tom investigates brain size and complexity and how it relates to animal intelligence. Does having a bigger brain correlate to the intelligence of an animal or is it the relative brain size and complexity that determines it? Or is it none of these? Find out a bit about the history of comparative brain size studies, what we learnt from them and why they needed to change! Tom takes a look at the marine mammals, specifically cetaceans and looks at their case of being intelligent, are they as smart as people think? Music by: Joakim Karud - https://soundcloud.com/joakimkarud.