The experiment was designed to explore whether the monkeys can discriminate between body odors of female group members and those of females from different social groups. (sciencedaily.com)
They may work different jobs, live in very different regions, hang out in very different social groups. (sciencenewsforstudents.org)
This change is sustainable over time and in future generations, as it spreads through different social groups. (ukbreastfeeding.org)