english: If we look across many, many different species of animals, not just us primates, but also including other mammals, birds, even marsupials like kangaroos and wombats, it turns out that there's a relationship between how long a childhood a species has and how big their brains are compared to their bodies and how smart and flexible they are.
non_english: Če pregledamo veliko, veliko različnih živalskih vrst, ne samo nas, primate, temveč tudi druge sesalce, ptiče, celo vrečarje kot so kenguruji in vombati, se izkaže, da obstaja povezava med tem, kako dolgo otroštvo ima vrsta, in tem, kako veliki so možgani v primerjavi s telesom, ter tem, kako bistri in fleksibilni so osebki.