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.
Nese shohim neper shume, shume specie te ndryshme kafshesh. jo vetem tek ne primatet, por gjithashtu duke perfshire gjitaret e tjere, zogjte, madje edhe marsupialet si kanguret dhe urithet, rezulton qe ka nje lidhje midis kohezgjatjes se femijerise qe ka nje specie dhe sa shume mendjet e tyre krahasohen me trupat dhe sa te zgjuar dhe fleksibel ato jane.