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: Ako pogledamo mnoge, mnoge različite vrste životinja, ne samo nas primate, već takođe i druge sisare, ptice, čak i torbare kao što su kenguri i vombati, pokazuje se da postoji odnos između toga koliko dugo detinjstvo traje kod neke vrste i toga koliki je njihov mozak u poređenju sa telom i koliko su pametne i prilagodljive.