english: Anthropologist Joan Silk's work shows that female baboons who have a core of female friends show lower levels of stress via their cortisol levels, they live longer and they have more surviving offspring.
non_english: Rad Antropološkinje Džoan Silk pokazuje da ženke babuna koje imaju jezgro ženskih prijateljstava pokazuju, preko nivoa kortizola, niže nivoe stresa žive duže i imaju više preživelih potomaka.